312001140431021 has 4 divisors (see below), whose sum is σ = 312003269362752. Its totient is φ = 311999011499292.

The previous prime is 312001140431017. The next prime is 312001140431089. The reversal of 312001140431021 is 120134041100213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312001140431021 - 2² = 312001140431017 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 (312001140401021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064246021 + ... + 1064539146.

It is an arithmetic number, because the mean of its divisors is an integer number (78000817340688).

Almost surely, 2^{312001140431021} is an apocalyptic number.

It is an amenable number.

312001140431021 is a deficient number, since it is larger than the sum of its proper divisors (2128931731).

312001140431021 is a wasteful number, since it uses less digits than its factorization.

312001140431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128931730.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 312001140431021 its reverse (120134041100213), we get a palindrome (432135181531234).

The spelling of 312001140431021 in words is "three hundred twelve trillion, one billion, one hundred forty million, four hundred thirty-one thousand, twenty-one".