Is Krillion a Real Number? What the Word Really Means
Short answer: no — krillion is not a real number. It has no official value in mathematics, no entry as a number in any major dictionary, and no place in the naming sequence that runs million, billion, trillion. It is a made-up -illion word, a comic way of saying "an extremely large, deliberately vague amount" — in the same family as zillion, jillion and bajillion. Here is where the word came from, why the internet keeps assigning it values anyway, and what it means inside the game that borrowed it.
What krillion actually means
Krillion belongs to English's family of indefinite hyperbolic numbers: zillion, jillion, bajillion, gazillion. These are real words with real jobs — Merriam-Webster defines zillion as "an indeterminately large number" — but their job is vagueness, not quantity. Nobody who says "there were a zillion people at the concert" means a specific count; they mean "more than I could possibly tally." Krillion is the newest and least-established member of that family: people reach for it when million and billion feel too small to be funny.
Where the word comes from
The word is a blend of krill and million. Krill are thumb-sized crustaceans that swarm through the Southern Ocean in aggregations estimated in the hundreds of trillions of individuals — one of the largest biomasses of any wild animal on Earth. If you need a mascot for "an uncountably huge crowd," a krill swarm is about as good as it gets.
The word's big break came in the 2011 animated film Happy Feet 2, where a tiny krill named Will breaks from the swarm and declares: "I am one in a krillion." The line became a TikTok meme around 2023 and gave the word most of its current cultural footprint — the full meme history is covered in our article on One in a Krillion, the game's top rarity tier, so I won't repeat it here.
The real number sequence — and where krillion isn't
English has an official naming ladder for large numbers, and every rung follows a strict pattern: each new -illion adds three more zeros.
- million — 10^6 (a 1 with 6 zeros)
- billion — 10^9
- trillion — 10^12
- quadrillion — 10^15
- quintillion — 10^18
- sextillion — 10^21
- septillion — 10^24
- octillion — 10^27
- nonillion — 10^30
- decillion — 10^33
The ladder keeps climbing by Latin prefix — vigintillion is 10^63 — and beyond the named rungs sits the famous outlier: a googol, 10^100, a 1 followed by 100 zeros. Krillion appears nowhere in this system. The test is simple: real -illion numbers derive from Latin number prefixes, and "krill" is a crustacean, not a prefix.
Why the internet gives krillion a value anyway
Search "krillion number" and you will find pages confidently stating a specific value for it — fictional googology wikis, Urban Dictionary entries, Reddit joke threads. Googology, the hobby of inventing and naming ever-larger numbers, is a real community with genuine creativity, and its members have proposed values for krillion more than once. But those values are fan fiction for numbers: playful, sometimes internally consistent, and recognized by no mathematician, standard or dictionary. Two different fan wikis don't even agree with each other. Enjoy them as creative writing about numbers — just don't cite them as fact.
What krillion means in the Krillion game
In the daily word game Krillion, the word does double duty, and the name is the pun. You answer seven prompts a day at krillion.io, and every valid answer is scored against the crowd: common answers sink to the Plankton tier while rare ones climb. The game is a swarm — a krillion guesses churning at once — but the point is to be the one answer that isn't like the others, capped by the top tier called One in a Krillion. Rare versus countless, in one word. The arithmetic of that scoring is in our scoring math breakdown, and the full six-tier ladder lives on the rarity tiers reference.
An honest limitation
I'm an answer-sheet archivist, not a mathematician or a lexicographer, and two honest caveats go with this article. First, "krillion is not a real number" is true as of today but not a law of nature — zillion was once a joke word too, and dictionaries eventually admitted it; if krillion keeps spreading, it may follow. Second, there is no central authority that certifies number names, so the claim rests on a checkable absence: krillion appears in no standard reference work, while million through decillion and googol appear in all of them. You can verify that yourself in five minutes, and I'd rather you did.
Frequently asked questions
Is krillion a real number?
No. Krillion is a made-up -illion word — the same family as zillion, jillion and bajillion — used to mean an extremely large but deliberately vague amount. It appears in no official number naming system: the real sequence runs million, billion, trillion, quadrillion and so on, with no krillion anywhere in it.
What does krillion mean?
Krillion means “an enormous, uncountable number” — a comic exaggeration rather than a quantity you can write down. The word blends krill, the tiny crustaceans famous for swarming in the billions, with million, and it spread after the 2011 film Happy Feet 2 had a krill declare “I am one in a krillion.”
Is krillion bigger than a trillion?
There is no official answer, because krillion has no defined value. But as a made-up word it is meant to feel bigger: a trillion is a real, countable number (1,000,000,000,000), while krillion signals “so many I’m not even counting.” Fan wikis assign it specific huge values, but none of those are recognized.