312132330021 has 8 divisors (see below), whose sum is σ = 416179023840. Its totient is φ = 208086928112.

The previous prime is 312132330007. The next prime is 312132330043. The reversal of 312132330021 is 120033231213.

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 312132330021 - 2¹⁰ = 312132328997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312132330021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312132330001) 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, 749995 + ... + 1089383.

It is an arithmetic number, because the mean of its divisors is an integer number (52022377980).

Almost surely, 2^312132330021 is an apocalyptic number.

It is an amenable number.

312132330021 is a deficient number, since it is larger than the sum of its proper divisors (104046693819).

312132330021 is a wasteful number, since it uses less digits than its factorization.

312132330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645955.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 312132330021 its reverse (120033231213), we get a palindrome (432165561234).

The spelling of 312132330021 in words is "three hundred twelve billion, one hundred thirty-two million, three hundred thirty thousand, twenty-one".