31212013199999 has 8 divisors (see below), whose sum is σ = 31955316911232. Its totient is φ = 30469502349720.

The previous prime is 31212013199993. The next prime is 31212013200013. The reversal of 31212013199999 is 99999131021213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31212013199999 - 2¹² = 31212013195903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212013199993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198135569 + ... + 198293034.

It is an arithmetic number, because the mean of its divisors is an integer number (3994414613904).

Almost surely, 2^{31212013199999} is an apocalyptic number.

31212013199999 is a deficient number, since it is larger than the sum of its proper divisors (743303711233).

31212013199999 is a wasteful number, since it uses less digits than its factorization.

31212013199999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396430477.

The product of its (nonzero) digits is 2125764, while the sum is 59.

The spelling of 31212013199999 in words is "thirty-one trillion, two hundred twelve billion, thirteen million, one hundred ninety-nine thousand, nine hundred ninety-nine".