21023112110 has 128 divisors (see below), whose sum is σ = 50948352000. Its totient is φ = 6031941120.

The previous prime is 21023112059. The next prime is 21023112113. The reversal of 21023112110 is 1121132012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023112113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3891191 + ... + 3896589.

It is an arithmetic number, because the mean of its divisors is an integer number (398034000).

Almost surely, 2^21023112110 is an apocalyptic number.

21023112110 is an abundant number, since it is smaller than the sum of its proper divisors (29925239890).

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

21023112110 is a wasteful number, since it uses less digits than its factorization.

21023112110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5826.

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

Adding to 21023112110 its reverse (1121132012), we get a palindrome (22144244122).

The spelling of 21023112110 in words is "twenty-one billion, twenty-three million, one hundred twelve thousand, one hundred ten".