1312310113021 has 4 divisors (see below), whose sum is σ = 1354642697344. Its totient is φ = 1269977528700.

The previous prime is 1312310113013. The next prime is 1312310113043. The reversal of 1312310113021 is 1203110132131.

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 1312310113021 - 2³ = 1312310113013 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 1312310113021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312310116021) 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, 21166292115 + ... + 21166292176.

It is an arithmetic number, because the mean of its divisors is an integer number (338660674336).

Almost surely, 2^{1312310113021} is an apocalyptic number.

It is an amenable number.

1312310113021 is a deficient number, since it is larger than the sum of its proper divisors (42332584323).

1312310113021 is an equidigital number, since it uses as much as digits as its factorization.

1312310113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42332584322.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1312310113021 its reverse (1203110132131), we get a palindrome (2515420245152).

The spelling of 1312310113021 in words is "one trillion, three hundred twelve billion, three hundred ten million, one hundred thirteen thousand, twenty-one".