31112012 has 12 divisors (see below), whose sum is σ = 56323680. Its totient is φ = 15019536.

The previous prime is 31112009. The next prime is 31112021. The reversal of 31112012 is 21021113.

It is a junction number, because it is equal to n+sod(n) for n = 31111984 and 31112002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133988 + ... + 134219.

It is an arithmetic number, because the mean of its divisors is an integer number (4693640).

Almost surely, 2^31112012 is an apocalyptic number.

It is an amenable number.

31112012 is a deficient number, since it is larger than the sum of its proper divisors (25211668).

31112012 is a wasteful number, since it uses less digits than its factorization.

31112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268240 (or 268238 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 31112012 is about 5577.8142672556. The cubic root of 31112012 is about 314.5159677904.

Adding to 31112012 its reverse (21021113), we get a palindrome (52133125).

The spelling of 31112012 in words is "thirty-one million, one hundred twelve thousand, twelve".