Written as a binary number, 10 + 101 + 1010 = 10001.
http://wiki.answers.com/Q/What_is_the_sum_of_the_b...

Number 4 in decimal (base 10) is 100 in binary (base 2) as it is: 1 four,
http://www.chacha.com/question/whatisthenumber...

10011.
http://answers.yahoo.com/question/index?qid=200805...

Actually, I believe TheSicilianSage gave us the number of digits in the binary representation of googol, not googolplex. But he provided the correct method. We would want to solve
http://uk.answers.yahoo.com/question/index?qid=201...
