311320202321 has 2 divisors, whose sum is σ = 311320202322. Its totient is φ = 311320202320.

The previous prime is 311320202317. The next prime is 311320202353. The reversal of 311320202321 is 123202023113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161620080400 + 149700121921 = 402020^2 + 386911^2 .

It is a cyclic number.

It is not a de Polignac number, because 311320202321 - 2² = 311320202317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311320202293 and 311320202302.

It is not a weakly prime, because it can be changed into another prime (311320202311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155660101160 + 155660101161.

It is an arithmetic number, because the mean of its divisors is an integer number (155660101161).

Almost surely, 2^311320202321 is an apocalyptic number.

It is an amenable number.

311320202321 is a deficient number, since it is larger than the sum of its proper divisors (1).

311320202321 is an equidigital number, since it uses as much as digits as its factorization.

311320202321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 311320202321 its reverse (123202023113), we get a palindrome (434522225434).

The spelling of 311320202321 in words is "three hundred eleven billion, three hundred twenty million, two hundred two thousand, three hundred twenty-one".