31213101032 has 16 divisors (see below), whose sum is σ = 58847907300. Its totient is φ = 15520325760.

The previous prime is 31213101013. The next prime is 31213101083. The reversal of 31213101032 is 23010131213.

It can be written as a sum of positive squares in 2 ways, for example, as 25957720996 + 5255380036 = 161114^2 + 72494^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31213101032.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10776557 + ... + 10779452.

Almost surely, 2^31213101032 is an apocalyptic number.

It is an amenable number.

31213101032 is a deficient number, since it is larger than the sum of its proper divisors (27634806268).

31213101032 is a wasteful number, since it uses less digits than its factorization.

31213101032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21556196 (or 21556192 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31213101032 its reverse (23010131213), we get a palindrome (54223232245).

The spelling of 31213101032 in words is "thirty-one billion, two hundred thirteen million, one hundred one thousand, thirty-two".