21113211030 has 32 divisors (see below), whose sum is σ = 53652396384. Its totient is φ = 5299001856.

The previous prime is 21113211023. The next prime is 21113211073. The reversal of 21113211030 is 3011231112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 20698717 + ... + 20699736.

It is an arithmetic number, because the mean of its divisors is an integer number (1676637387).

Almost surely, 2^21113211030 is an apocalyptic number.

21113211030 is an abundant number, since it is smaller than the sum of its proper divisors (32539185354).

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

21113211030 is a wasteful number, since it uses less digits than its factorization.

21113211030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41398480.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21113211030 its reverse (3011231112), we get a palindrome (24124442142).

The spelling of 21113211030 in words is "twenty-one billion, one hundred thirteen million, two hundred eleven thousand, thirty".