31212031332 has 48 divisors (see below), whose sum is σ = 73465582400. Its totient is φ = 10313170560.

The previous prime is 31212031321. The next prime is 31212031387. The reversal of 31212031332 is 23313021213.

It is a junction number, because it is equal to n+sod(n) for n = 31212031299 and 31212031308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1088394 + ... + 1116702.

Almost surely, 2^31212031332 is an apocalyptic number.

It is an amenable number.

31212031332 is an abundant number, since it is smaller than the sum of its proper divisors (42253551068).

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

31212031332 is a wasteful number, since it uses less digits than its factorization.

31212031332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29116 (or 29114 counting only the distinct ones).

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

Adding to 31212031332 its reverse (23313021213), we get a palindrome (54525052545).

The spelling of 31212031332 in words is "thirty-one billion, two hundred twelve million, thirty-one thousand, three hundred thirty-two".