31331220132120 has 32 divisors (see below), whose sum is σ = 93993660396720. Its totient is φ = 8354992035200.

The previous prime is 31331220132013. The next prime is 31331220132131. The reversal of 31331220132120 is 2123102213313.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130546750431 + ... + 130546750670.

Almost surely, 2^{31331220132120} is an apocalyptic number.

31331220132120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31331220132120 is an abundant number, since it is smaller than the sum of its proper divisors (62662440264600).

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

31331220132120 is a wasteful number, since it uses less digits than its factorization.

31331220132120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261093501115 (or 261093501111 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31331220132120 its reverse (2123102213313), we get a palindrome (33454322345433).

The spelling of 31331220132120 in words is "thirty-one trillion, three hundred thirty-one billion, two hundred twenty million, one hundred thirty-two thousand, one hundred twenty".