312132211999 has 4 divisors (see below), whose sum is σ = 312471856240. Its totient is φ = 311792567760.

The previous prime is 312132211991. The next prime is 312132212081. The reversal of 312132211999 is 999112231213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999112231213 = 52457 ⋅19046309.

It is a cyclic number.

It is not a de Polignac number, because 312132211999 - 2³ = 312132211991 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 (312132211991) by changing a digit.

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, 169820742 + ... + 169822579.

It is an arithmetic number, because the mean of its divisors is an integer number (78117964060).

Almost surely, 2^312132211999 is an apocalyptic number.

312132211999 is a deficient number, since it is larger than the sum of its proper divisors (339644241).

312132211999 is an equidigital number, since it uses as much as digits as its factorization.

312132211999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339644240.

The product of its digits is 52488, while the sum is 43.

The spelling of 312132211999 in words is "three hundred twelve billion, one hundred thirty-two million, two hundred eleven thousand, nine hundred ninety-nine".