312105063221021 has 4 divisors (see below), whose sum is σ = 356691500824032. Its totient is φ = 267518625618012.

The previous prime is 312105063220969. The next prime is 312105063221071. The reversal of 312105063221021 is 120122360501213.

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 312105063221021 - 2³⁸ = 311830185314077 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 (312105063221071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22293218801495 + ... + 22293218801508.

It is an arithmetic number, because the mean of its divisors is an integer number (89172875206008).

Almost surely, 2^{312105063221021} is an apocalyptic number.

It is an amenable number.

312105063221021 is a deficient number, since it is larger than the sum of its proper divisors (44586437603011).

312105063221021 is an equidigital number, since it uses as much as digits as its factorization.

312105063221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44586437603010.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 312105063221021 in words is "three hundred twelve trillion, one hundred five billion, sixty-three million, two hundred twenty-one thousand, twenty-one".