31231322222012 has 48 divisors (see below), whose sum is σ = 60964591542624. Its totient is φ = 13878638592000.

The previous prime is 31231322221973. The next prime is 31231322222017. The reversal of 31231322222012 is 21022222313213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231322222017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23174789 + ... + 24485372.

It is an arithmetic number, because the mean of its divisors is an integer number (1270095657138).

Almost surely, 2^{31231322222012} is an apocalyptic number.

It is an amenable number.

31231322222012 is a deficient number, since it is larger than the sum of its proper divisors (29733269320612).

31231322222012 is a wasteful number, since it uses less digits than its factorization.

31231322222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47660510 (or 47660508 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31231322222012 its reverse (21022222313213), we get a palindrome (52253544535225).

The spelling of 31231322222012 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty-two million, two hundred twenty-two thousand, twelve".