21113352522 has 24 divisors (see below), whose sum is σ = 45748664676. Its totient is φ = 7037312256.

The previous prime is 21113352509. The next prime is 21113352569. The reversal of 21113352522 is 22525331112.

21113352522 is a `hidden beast` number, since 2 + 1 + 1 + 133 + 5 + 2 + 522 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16238659761 + 4874692761 = 127431^2 + 69819^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330618 + ... + 389274.

Almost surely, 2^21113352522 is an apocalyptic number.

21113352522 is an abundant number, since it is smaller than the sum of its proper divisors (24635312154).

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

21113352522 is a wasteful number, since it uses less digits than its factorization.

21113352522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78662 (or 78659 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

Adding to 21113352522 its reverse (22525331112), we get a palindrome (43638683634).

The spelling of 21113352522 in words is "twenty-one billion, one hundred thirteen million, three hundred fifty-two thousand, five hundred twenty-two".