21313031110 has 32 divisors (see below), whose sum is σ = 44278062912. Its totient is φ = 7234972800.

The previous prime is 21313031099. The next prime is 21313031119. The reversal of 21313031110 is 1113031312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313031119) 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 15 ways as a sum of consecutive naturals, for example, 1500217 + ... + 1514356.

It is an arithmetic number, because the mean of its divisors is an integer number (1383689466).

Almost surely, 2^21313031110 is an apocalyptic number.

21313031110 is an abundant number, since it is smaller than the sum of its proper divisors (22965031802).

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

21313031110 is a wasteful number, since it uses less digits than its factorization.

21313031110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014688.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21313031110 its reverse (1113031312), we get a palindrome (22426062422).

The spelling of 21313031110 in words is "twenty-one billion, three hundred thirteen million, thirty-one thousand, one hundred ten".