21023110112 has 48 divisors (see below), whose sum is σ = 43838634672. Its totient is φ = 9889904640.

The previous prime is 21023110111. The next prime is 21023110127. The reversal of 21023110112 is 21101132012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023110111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2509643 + ... + 2518005.

It is an arithmetic number, because the mean of its divisors is an integer number (913304889).

Almost surely, 2^21023110112 is an apocalyptic number.

It is an amenable number.

21023110112 is an abundant number, since it is smaller than the sum of its proper divisors (22815524560).

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

21023110112 is a wasteful number, since it uses less digits than its factorization.

21023110112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13011 (or 13003 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21023110112 its reverse (21101132012), we get a palindrome (42124242124).

The spelling of 21023110112 in words is "twenty-one billion, twenty-three million, one hundred ten thousand, one hundred twelve".