311122210213 has 2 divisors, whose sum is σ = 311122210214. Its totient is φ = 311122210212.

The previous prime is 311122210181. The next prime is 311122210229. The reversal of 311122210213 is 312012221113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194416619329 + 116705590884 = 440927^2 + 341622^2 .

It is a cyclic number.

It is not a de Polignac number, because 311122210213 - 2⁵ = 311122210181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311129210213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155561105106 + 155561105107.

It is an arithmetic number, because the mean of its divisors is an integer number (155561105107).

Almost surely, 2^311122210213 is an apocalyptic number.

It is an amenable number.

311122210213 is a deficient number, since it is larger than the sum of its proper divisors (1).

311122210213 is an equidigital number, since it uses as much as digits as its factorization.

311122210213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 311122210213 its reverse (312012221113), we get a palindrome (623134431326).

The spelling of 311122210213 in words is "three hundred eleven billion, one hundred twenty-two million, two hundred ten thousand, two hundred thirteen".