312102023021 has 4 divisors (see below), whose sum is σ = 314484481344. Its totient is φ = 309719564700.

The previous prime is 312102023017. The next prime is 312102023047. The reversal of 312102023021 is 120320201213.

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: 120320201213 = 109 ⋅1103855057.

It is a cyclic number.

It is not a de Polignac number, because 312102023021 - 2² = 312102023017 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 (312102023221) 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, 1191228965 + ... + 1191229226.

It is an arithmetic number, because the mean of its divisors is an integer number (78621120336).

Almost surely, 2^312102023021 is an apocalyptic number.

It is an amenable number.

312102023021 is a deficient number, since it is larger than the sum of its proper divisors (2382458323).

312102023021 is a wasteful number, since it uses less digits than its factorization.

312102023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382458322.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 312102023021 its reverse (120320201213), we get a palindrome (432422224234).

The spelling of 312102023021 in words is "three hundred twelve billion, one hundred two million, twenty-three thousand, twenty-one".