312131132012 has 12 divisors (see below), whose sum is σ = 624262264080. Its totient is φ = 133770485136.

The previous prime is 312131131969. The next prime is 312131132021. The reversal of 312131132012 is 210231131213.

It is a happy number.

312131132012 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5573770187 + ... + 5573770242.

It is an arithmetic number, because the mean of its divisors is an integer number (52021855340).

Almost surely, 2^312131132012 is an apocalyptic number.

It is an amenable number.

312131132012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

312131132012 is a wasteful number, since it uses less digits than its factorization.

312131132012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11147540440 (or 11147540438 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 312131132012 its reverse (210231131213), we get a palindrome (522362263225).

The spelling of 312131132012 in words is "three hundred twelve billion, one hundred thirty-one million, one hundred thirty-two thousand, twelve".