31011212312 has 128 divisors (see below), whose sum is σ = 62868960000. Its totient is φ = 14318223360.

The previous prime is 31011212257. The next prime is 31011212341. The reversal of 31011212312 is 21321211013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69067064 + ... + 69067512.

It is an arithmetic number, because the mean of its divisors is an integer number (491163750).

Almost surely, 2^31011212312 is an apocalyptic number.

It is an amenable number.

31011212312 is an abundant number, since it is smaller than the sum of its proper divisors (31857747688).

31011212312 is a wasteful number, since it uses less digits than its factorization.

31011212312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31011212312 its reverse (21321211013), we get a palindrome (52332423325).

The spelling of 31011212312 in words is "thirty-one billion, eleven million, two hundred twelve thousand, three hundred twelve".