312144322021 has 4 divisors (see below), whose sum is σ = 356736368032. Its totient is φ = 267552276012.

The previous prime is 312144322001. The next prime is 312144322037. The reversal of 312144322021 is 120223441213.

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 not a de Polignac number, because 312144322021 - 2¹¹ = 312144319973 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 (312144322001) 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, 22296022995 + ... + 22296023008.

It is an arithmetic number, because the mean of its divisors is an integer number (89184092008).

Almost surely, 2^312144322021 is an apocalyptic number.

It is an amenable number.

312144322021 is a deficient number, since it is larger than the sum of its proper divisors (44592046011).

312144322021 is an equidigital number, since it uses as much as digits as its factorization.

312144322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44592046010.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 312144322021 its reverse (120223441213), we get a palindrome (432367763234).

The spelling of 312144322021 in words is "three hundred twelve billion, one hundred forty-four million, three hundred twenty-two thousand, twenty-one".