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A Tredecillion (1 Tredecillion) is 10 to the power of 42 (10^42). This is an immensely big number!

How many zeros in a Tredecillion?

There are 42 zeros in a Tredecillion.

What's before Tredecillion?

A Duodecillion is smaller than a Tredecillion.

What's after Tredecillion?

A Quattuordecillion is larger than a Tredecillion.


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

Is Tredecillion the largest number?

Tredecillion 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.

Tredecillion written out

Tredecillion is written out as:


Big Numbers

This is just one of many really big numbers!

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