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A Centillion (1 Centillion) is 10 to the power of 303 (10^303). This is an immensely astronomical number!

How many zeros in a Centillion?

There are 303 zeros in a Centillion.

What's before Centillion?

A Novenonagintillion is smaller than a Centillion.

What's after Centillion?

A Uncentillion is larger than a Centillion.


A Centillionaire is someone whos assets, net worth or wealth is 1 or more Centillion. It is unlikely anyone will ever be a true Centillionaire. If you want to be a Centillionaire, play Tap Tales!

Is Centillion the largest number?

Centillion is not the largest number. Infinity best describes the largest possible number - if there even is one! We cannot comprehend what the largest number actually is.

Centillion written out

Centillion is written out as:


Big Numbers

This is just one of many really big numbers!

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