31112031012 has 12 divisors (see below), whose sum is σ = 72594739056. Its totient is φ = 10370677000.

The previous prime is 31112030933. The next prime is 31112031017. The reversal of 31112031012 is 21013021113.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 31112030982 and 31112031000.

It is not an unprimeable number, because it can be changed into a prime (31112031017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1296334614 + ... + 1296334637.

It is an arithmetic number, because the mean of its divisors is an integer number (6049561588).

Almost surely, 2^31112031012 is an apocalyptic number.

It is an amenable number.

31112031012 is an abundant number, since it is smaller than the sum of its proper divisors (41482708044).

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

31112031012 is a wasteful number, since it uses less digits than its factorization.

31112031012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592669258 (or 2592669256 counting only the distinct ones).

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

Adding to 31112031012 its reverse (21013021113), we get a palindrome (52125052125).

The spelling of 31112031012 in words is "thirty-one billion, one hundred twelve million, thirty-one thousand, twelve".