321512122313 has 2 divisors, whose sum is σ = 321512122314. Its totient is φ = 321512122312.

The previous prime is 321512122279. The next prime is 321512122333. The reversal of 321512122313 is 313221215123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249028944784 + 72483177529 = 499028^2 + 269227^2 .

It is a cyclic number.

It is not a de Polignac number, because 321512122313 - 2¹² = 321512118217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (321512122333) 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 as a sum of consecutive naturals, namely, 160756061156 + 160756061157.

It is an arithmetic number, because the mean of its divisors is an integer number (160756061157).

Almost surely, 2^321512122313 is an apocalyptic number.

It is an amenable number.

321512122313 is a deficient number, since it is larger than the sum of its proper divisors (1).

321512122313 is an equidigital number, since it uses as much as digits as its factorization.

321512122313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

Adding to 321512122313 its reverse (313221215123), we get a palindrome (634733337436).

The spelling of 321512122313 in words is "three hundred twenty-one billion, five hundred twelve million, one hundred twenty-two thousand, three hundred thirteen".