31212300312 has 96 divisors (see below), whose sum is σ = 90875865600. Its totient is φ = 9646782912.

The previous prime is 31212300299. The next prime is 31212300337. The reversal of 31212300312 is 21300321213.

31212300312 is a `hidden beast` number, since 3 + 121 + 230 + 0 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178428 + ... + 307019.

It is an arithmetic number, because the mean of its divisors is an integer number (946623600).

Almost surely, 2^31212300312 is an apocalyptic number.

It is an amenable number.

31212300312 is an abundant number, since it is smaller than the sum of its proper divisors (59663565288).

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

31212300312 is a wasteful number, since it uses less digits than its factorization.

31212300312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485525 (or 485518 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31212300312 its reverse (21300321213), we get a palindrome (52512621525).

The spelling of 31212300312 in words is "thirty-one billion, two hundred twelve million, three hundred thousand, three hundred twelve".