31331222012 has 48 divisors (see below), whose sum is σ = 57554183232. Its totient is φ = 14895513600.

The previous prime is 31331221997. The next prime is 31331222029. The reversal of 31331222012 is 21022213313.

It is a congruent number.

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, 25744028 + ... + 25745244.

It is an arithmetic number, because the mean of its divisors is an integer number (1199045484).

Almost surely, 2^31331222012 is an apocalyptic number.

It is an amenable number.

31331222012 is a deficient number, since it is larger than the sum of its proper divisors (26222961220).

31331222012 is a wasteful number, since it uses less digits than its factorization.

31331222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2678 (or 2676 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31331222012 its reverse (21022213313), we get a palindrome (52353435325).

The spelling of 31331222012 in words is "thirty-one billion, three hundred thirty-one million, two hundred twenty-two thousand, twelve".