312444151021 has 4 divisors (see below), whose sum is σ = 319710294112. Its totient is φ = 305178007932.

The previous prime is 312444151001. The next prime is 312444151027. The reversal of 312444151021 is 120151444213.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120151444213 = 16333 ⋅7356361.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312444151021 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 (312444151027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3633071481 + ... + 3633071566.

It is an arithmetic number, because the mean of its divisors is an integer number (79927573528).

Almost surely, 2^312444151021 is an apocalyptic number.

It is an amenable number.

312444151021 is a deficient number, since it is larger than the sum of its proper divisors (7266143091).

312444151021 is an equidigital number, since it uses as much as digits as its factorization.

312444151021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7266143090.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 312444151021 its reverse (120151444213), we get a palindrome (432595595234).

The spelling of 312444151021 in words is "three hundred twelve billion, four hundred forty-four million, one hundred fifty-one thousand, twenty-one".