31011132012 has 48 divisors (see below), whose sum is σ = 87560847360. Its totient is φ = 8339127552.

The previous prime is 31011131999. The next prime is 31011132023. The reversal of 31011132012 is 21023111013.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31011131982 and 31011132000.

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, 10856812 + ... + 10859667.

It is an arithmetic number, because the mean of its divisors is an integer number (1824184320).

Almost surely, 2^31011132012 is an apocalyptic number.

It is an amenable number.

31011132012 is an abundant number, since it is smaller than the sum of its proper divisors (56549715348).

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

31011132012 is a wasteful number, since it uses less digits than its factorization.

31011132012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21716510 (or 21716508 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31011132012 its reverse (21023111013), we get a palindrome (52034243025).

The spelling of 31011132012 in words is "thirty-one billion, eleven million, one hundred thirty-two thousand, twelve".