31012132312 has 32 divisors (see below), whose sum is σ = 66719358720. Its totient is φ = 13237956000.

The previous prime is 31012132303. The next prime is 31012132357. The reversal of 31012132312 is 21323121013.

It is a self number, because there is not a number n which added to its sum of digits gives 31012132312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1089108 + ... + 1117219.

It is an arithmetic number, because the mean of its divisors is an integer number (2084979960).

Almost surely, 2^31012132312 is an apocalyptic number.

It is an amenable number.

31012132312 is an abundant number, since it is smaller than the sum of its proper divisors (35707226408).

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

31012132312 is a wasteful number, since it uses less digits than its factorization.

31012132312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206591 (or 2206587 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31012132312 its reverse (21323121013), we get a palindrome (52335253325).

The spelling of 31012132312 in words is "thirty-one billion, twelve million, one hundred thirty-two thousand, three hundred twelve".