What number has 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 zeroes?

The number with 100 octillion zeros is called a "googol." A googol is represented as (10^{100}), meaning it is a 1 followed by 100 zeros, not the number you described. The figure you mentioned seems to imply a much larger number, specifically (10^{10^{100}}), which is known as a googolplex, represented by a 1 followed by a googol (10^100) zeros.