21023031110 has 16 divisors (see below), whose sum is σ = 38864198736. Its totient is φ = 8181936288.

The previous prime is 21023031101. The next prime is 21023031119. The reversal of 21023031110 is 1113032012.

It is an interprime number because it is at equal distance from previous prime (21023031101) and next prime (21023031119).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023031119) 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 7 ways as a sum of consecutive naturals, for example, 28409132 + ... + 28409871.

It is an arithmetic number, because the mean of its divisors is an integer number (2429012421).

Almost surely, 2^21023031110 is an apocalyptic number.

21023031110 is a deficient number, since it is larger than the sum of its proper divisors (17841167626).

21023031110 is a wasteful number, since it uses less digits than its factorization.

21023031110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56819047.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21023031110 its reverse (1113032012), we get a palindrome (22136063122).

The spelling of 21023031110 in words is "twenty-one billion, twenty-three million, thirty-one thousand, one hundred ten".