31130221100 has 72 divisors (see below), whose sum is σ = 76234964400. Its totient is φ = 10929721600.

The previous prime is 31130221093. The next prime is 31130221117. The reversal of 31130221100 is 112203113.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 456035 + ... + 519834.

It is an arithmetic number, because the mean of its divisors is an integer number (1058818950).

Almost surely, 2^31130221100 is an apocalyptic number.

It is an amenable number.

31130221100 is an abundant number, since it is smaller than the sum of its proper divisors (45104743300).

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

31130221100 is a wasteful number, since it uses less digits than its factorization.

31130221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975923 (or 975916 counting only the distinct ones).

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

Adding to 31130221100 its reverse (112203113), we get a palindrome (31242424213).

The spelling of 31130221100 in words is "thirty-one billion, one hundred thirty million, two hundred twenty-one thousand, one hundred".