31232221132120 has 64 divisors (see below), whose sum is σ = 74421488512800. Its totient is φ = 11755592570880.

The previous prime is 31232221132111. The next prime is 31232221132157. The reversal of 31232221132120 is 2123112223213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1418830 + ... + 8029789.

Almost surely, 2^{31232221132120} is an apocalyptic number.

It is an amenable number.

31232221132120 is an abundant number, since it is smaller than the sum of its proper divisors (43189267380680).

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

31232221132120 is a wasteful number, since it uses less digits than its factorization.

31232221132120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9453508 (or 9453504 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31232221132120 its reverse (2123112223213), we get a palindrome (33355333355333).

The spelling of 31232221132120 in words is "thirty-one trillion, two hundred thirty-two billion, two hundred twenty-one million, one hundred thirty-two thousand, one hundred twenty".