31213120332 has 24 divisors (see below), whose sum is σ = 72846899776. Its totient is φ = 10402046928.

The previous prime is 31213120303. The next prime is 31213120361. The reversal of 31213120332 is 23302131213.

It is an interprime number because it is at equal distance from previous prime (31213120303) and next prime (31213120361).

It is a junction number, because it is equal to n+sod(n) for n = 31213120299 and 31213120308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234478 + ... + 342645.

Almost surely, 2^31213120332 is an apocalyptic number.

It is an amenable number.

31213120332 is an abundant number, since it is smaller than the sum of its proper divisors (41633779444).

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

31213120332 is a wasteful number, since it uses less digits than its factorization.

31213120332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581637 (or 581635 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31213120332 its reverse (23302131213), we get a palindrome (54515251545).

The spelling of 31213120332 in words is "thirty-one billion, two hundred thirteen million, one hundred twenty thousand, three hundred thirty-two".