311211314213 has 2 divisors, whose sum is σ = 311211314214. Its totient is φ = 311211314212.

The previous prime is 311211314209. The next prime is 311211314257. The reversal of 311211314213 is 312413112113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 303240752929 + 7970561284 = 550673^2 + 89278^2 .

It is a cyclic number.

It is not a de Polignac number, because 311211314213 - 2² = 311211314209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311211313213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155605657106 + 155605657107.

It is an arithmetic number, because the mean of its divisors is an integer number (155605657107).

Almost surely, 2^311211314213 is an apocalyptic number.

It is an amenable number.

311211314213 is a deficient number, since it is larger than the sum of its proper divisors (1).

311211314213 is an equidigital number, since it uses as much as digits as its factorization.

311211314213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

Adding to 311211314213 its reverse (312413112113), we get a palindrome (623624426326).

The spelling of 311211314213 in words is "three hundred eleven billion, two hundred eleven million, three hundred fourteen thousand, two hundred thirteen".