313121344243 has 2 divisors, whose sum is σ = 313121344244. Its totient is φ = 313121344242.

The previous prime is 313121344219. The next prime is 313121344271. The reversal of 313121344243 is 342443121313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 313121344243 - 2²⁵ = 313087789811 is a prime.

It is not a weakly prime, because it can be changed into another prime (313121344273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156560672121 + 156560672122.

It is an arithmetic number, because the mean of its divisors is an integer number (156560672122).

Almost surely, 2^313121344243 is an apocalyptic number.

313121344243 is a deficient number, since it is larger than the sum of its proper divisors (1).

313121344243 is an equidigital number, since it uses as much as digits as its factorization.

313121344243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 31.

Adding to 313121344243 its reverse (342443121313), we get a palindrome (655564465556).

The spelling of 313121344243 in words is "three hundred thirteen billion, one hundred twenty-one million, three hundred forty-four thousand, two hundred forty-three".