312130310221013 has 4 divisors (see below), whose sum is σ = 330490916704620. Its totient is φ = 293769703737408.

The previous prime is 312130310220991. The next prime is 312130310221043. The reversal of 312130310221013 is 310122013031213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105847841144644 + 206282469076369 = 10288238^2 + 14362537^2 .

It is a cyclic number.

It is not a de Polignac number, because 312130310221013 - 2¹² = 312130310216917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312130310221013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312130310221043) 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, 9180303241778 + ... + 9180303241811.

It is an arithmetic number, because the mean of its divisors is an integer number (82622729176155).

Almost surely, 2^{312130310221013} is an apocalyptic number.

It is an amenable number.

312130310221013 is a deficient number, since it is larger than the sum of its proper divisors (18360606483607).

312130310221013 is a wasteful number, since it uses less digits than its factorization.

312130310221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18360606483606.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 312130310221013 its reverse (310122013031213), we get a palindrome (622252323252226).

The spelling of 312130310221013 in words is "three hundred twelve trillion, one hundred thirty billion, three hundred ten million, two hundred twenty-one thousand, thirteen".