21031013110 has 32 divisors (see below), whose sum is σ = 38403691200. Its totient is φ = 8290833408.

The previous prime is 21031013093. The next prime is 21031013131. The reversal of 21031013110 is 1131013012.

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, 1010974 + ... + 1031566.

It is an arithmetic number, because the mean of its divisors is an integer number (1200115350).

Almost surely, 2^21031013110 is an apocalyptic number.

21031013110 is a deficient number, since it is larger than the sum of its proper divisors (17372678090).

21031013110 is a wasteful number, since it uses less digits than its factorization.

21031013110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22072.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 21031013110 its reverse (1131013012), we get a palindrome (22162026122).

The spelling of 21031013110 in words is "twenty-one billion, thirty-one million, thirteen thousand, one hundred ten".