321311332213 has 2 divisors, whose sum is σ = 321311332214. Its totient is φ = 321311332212.

The previous prime is 321311332171. The next prime is 321311332241. The reversal of 321311332213 is 312233113123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195145713009 + 126165619204 = 441753^2 + 355198^2 .

It is an emirp because it is prime and its reverse (312233113123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321311332213 - 2¹³ = 321311324021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321311332253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160655666106 + 160655666107.

It is an arithmetic number, because the mean of its divisors is an integer number (160655666107).

Almost surely, 2^321311332213 is an apocalyptic number.

It is an amenable number.

321311332213 is a deficient number, since it is larger than the sum of its proper divisors (1).

321311332213 is an equidigital number, since it uses as much as digits as its factorization.

321311332213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 25.

Adding to 321311332213 its reverse (312233113123), we get a palindrome (633544445336).

The spelling of 321311332213 in words is "three hundred twenty-one billion, three hundred eleven million, three hundred thirty-two thousand, two hundred thirteen".