31032111012 has 72 divisors (see below), whose sum is σ = 85487288544. Its totient is φ = 8733973248.

The previous prime is 31032111001. The next prime is 31032111013. The reversal of 31032111012 is 21011123013.

It is a happy number.

It is a super-2 number, since 2×31032111012² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31032110982 and 31032111000.

It is not an unprimeable number, because it can be changed into a prime (31032111013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354453 + ... + 433244.

It is an arithmetic number, because the mean of its divisors is an integer number (1187323452).

Almost surely, 2^31032111012 is an apocalyptic number.

It is an amenable number.

31032111012 is an abundant number, since it is smaller than the sum of its proper divisors (54455177532).

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

31032111012 is a wasteful number, since it uses less digits than its factorization.

31032111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787785 (or 787776 counting only the distinct ones).

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

Adding to 31032111012 its reverse (21011123013), we get a palindrome (52043234025).

The spelling of 31032111012 in words is "thirty-one billion, thirty-two million, one hundred eleven thousand, twelve".