313321423222421 has 2 divisors, whose sum is σ = 313321423222422. Its totient is φ = 313321423222420.

The previous prime is 313321423222411. The next prime is 313321423222453. The reversal of 313321423222421 is 124222324123313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290569047919396 + 22752375303025 = 17046086^2 + 4769945^2 .

It is a cyclic number.

It is not a de Polignac number, because 313321423222421 - 2¹⁸ = 313321422960277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313321423222411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156660711611210 + 156660711611211.

It is an arithmetic number, because the mean of its divisors is an integer number (156660711611211).

Almost surely, 2^{313321423222421} is an apocalyptic number.

It is an amenable number.

313321423222421 is a deficient number, since it is larger than the sum of its proper divisors (1).

313321423222421 is an equidigital number, since it uses as much as digits as its factorization.

313321423222421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 35.

Adding to 313321423222421 its reverse (124222324123313), we get a palindrome (437543747345734).

The spelling of 313321423222421 in words is "three hundred thirteen trillion, three hundred twenty-one billion, four hundred twenty-three million, two hundred twenty-two thousand, four hundred twenty-one".