That is a googol. A googolplex is 10^(10^(100)), or10^(10^100) = infinity
Or one followed by 10^100 = 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 zeros.
References: http://mathworld.wolfram.com/Googolplex.html