31130123200 has 84 divisors (see below), whose sum is σ = 83563202952. Its totient is φ = 11320038400.

The previous prime is 31130123161. The next prime is 31130123231. The reversal of 31130123200 is 232103113.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 866779 + ... + 901978.

Almost surely, 2^31130123200 is an apocalyptic number.

It is an amenable number.

31130123200 is an abundant number, since it is smaller than the sum of its proper divisors (52433079752).

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

31130123200 is a wasteful number, since it uses less digits than its factorization.

31130123200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768790 (or 1768775 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31130123200 its reverse (232103113), we get a palindrome (31362226313).

The spelling of 31130123200 in words is "thirty-one billion, one hundred thirty million, one hundred twenty-three thousand, two hundred".