21113022256624 has 160 divisors (see below), whose sum is σ = 43085651341824. Its totient is φ = 10012743797760.

The previous prime is 21113022256589. The next prime is 21113022256643. The reversal of 21113022256624 is 42665222031112.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1432257894 + ... + 1432272634.

Almost surely, 2^{21113022256624} is an apocalyptic number.

It is an amenable number.

21113022256624 is an abundant number, since it is smaller than the sum of its proper divisors (21972629085200).

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

21113022256624 is a wasteful number, since it uses less digits than its factorization.

21113022256624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15255 (or 15249 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 21113022256624 its reverse (42665222031112), we get a palindrome (63778244287736).

The spelling of 21113022256624 in words is "twenty-one trillion, one hundred thirteen billion, twenty-two million, two hundred fifty-six thousand, six hundred twenty-four".