312311313210021 has 4 divisors (see below), whose sum is σ = 416415084280032. Its totient is φ = 208207542140012.

The previous prime is 312311313210007. The next prime is 312311313210041. The reversal of 312311313210021 is 120012313113213.

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 312311313210021 - 2¹⁰ = 312311313208997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312311313209973 and 312311313210000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312311313210041) 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, 52051885535001 + ... + 52051885535006.

It is an arithmetic number, because the mean of its divisors is an integer number (104103771070008).

Almost surely, 2^{312311313210021} is an apocalyptic number.

It is an amenable number.

312311313210021 is a deficient number, since it is larger than the sum of its proper divisors (104103771070011).

312311313210021 is a wasteful number, since it uses less digits than its factorization.

312311313210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104103771070010.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 312311313210021 its reverse (120012313113213), we get a palindrome (432323626323234).

The spelling of 312311313210021 in words is "three hundred twelve trillion, three hundred eleven billion, three hundred thirteen million, two hundred ten thousand, twenty-one".