31312232002120 has 16 divisors (see below), whose sum is σ = 70452522004860. Its totient is φ = 12524892800832.

The previous prime is 31312232002109. The next prime is 31312232002133. The reversal of 31312232002120 is 2120023221313.

It can be written as a sum of positive squares in 2 ways, for example, as 30284924074276 + 1027307927844 = 5503174^2 + 1013562^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31312232002091 and 31312232002100.

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 3 ways as a sum of consecutive naturals, for example, 391402899987 + ... + 391402900066.

Almost surely, 2^{31312232002120} is an apocalyptic number.

It is an amenable number.

31312232002120 is an abundant number, since it is smaller than the sum of its proper divisors (39140290002740).

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

31312232002120 is a wasteful number, since it uses less digits than its factorization.

31312232002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782805800064 (or 782805800060 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31312232002120 its reverse (2120023221313), we get a palindrome (33432255223433).

The spelling of 31312232002120 in words is "thirty-one trillion, three hundred twelve billion, two hundred thirty-two million, two thousand, one hundred twenty".