21112232010 has 64 divisors (see below), whose sum is σ = 51372921600. Its totient is φ = 5552087552.

The previous prime is 21112231999. The next prime is 21112232023. The reversal of 21112232010 is 1023221112.

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

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, 1028467 + ... + 1048793.

It is an arithmetic number, because the mean of its divisors is an integer number (802701900).

Almost surely, 2^21112232010 is an apocalyptic number.

21112232010 is an abundant number, since it is smaller than the sum of its proper divisors (30260689590).

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

21112232010 is a wasteful number, since it uses less digits than its factorization.

21112232010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20815.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21112232010 its reverse (1023221112), we get a palindrome (22135453122).

The spelling of 21112232010 in words is "twenty-one billion, one hundred twelve million, two hundred thirty-two thousand, ten".