11521557102 has 32 divisors (see below), whose sum is σ = 25217288064. Its totient is φ = 3480360800.

The previous prime is 11521557029. The next prime is 11521557161. The reversal of 11521557102 is 20175512511.

It is a self number, because there is not a number n which added to its sum of digits gives 11521557102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254424 + ... + 296267.

It is an arithmetic number, because the mean of its divisors is an integer number (788040252).

Almost surely, 2^11521557102 is an apocalyptic number.

11521557102 is an abundant number, since it is smaller than the sum of its proper divisors (13695730962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11521557102 is a wasteful number, since it uses less digits than its factorization.

11521557102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551024.

The product of its (nonzero) digits is 3500, while the sum is 30.

The spelling of 11521557102 in words is "eleven billion, five hundred twenty-one million, five hundred fifty-seven thousand, one hundred two".