What is a Centrillion?

Answer 1

An Centrillion is a 1 followed by 303 zeros.

Not quite. In the U.S., a centrillin is 1, then 303 zeroes. However, In UK and Britain, it is a 1 followed by 600 0's

Answer 2

A centillion is a name for a number represented by a 1 followed by 303 zeros, or 10^303. It is an extremely large number in the context of the decimal number system.