312121344163 has 2 divisors, whose sum is σ = 312121344164. Its totient is φ = 312121344162.

The previous prime is 312121344113. The next prime is 312121344169. The reversal of 312121344163 is 361443121213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312121344163 is a prime.

It is not a weakly prime, because it can be changed into another prime (312121344169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156060672081 + 156060672082.

It is an arithmetic number, because the mean of its divisors is an integer number (156060672082).

Almost surely, 2^312121344163 is an apocalyptic number.

312121344163 is a deficient number, since it is larger than the sum of its proper divisors (1).

312121344163 is an equidigital number, since it uses as much as digits as its factorization.

312121344163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

Adding to 312121344163 its reverse (361443121213), we get a palindrome (673564465376).

The spelling of 312121344163 in words is "three hundred twelve billion, one hundred twenty-one million, three hundred forty-four thousand, one hundred sixty-three".