311222132113 has 2 divisors, whose sum is σ = 311222132114. Its totient is φ = 311222132112.

The previous prime is 311222132059. The next prime is 311222132191. The reversal of 311222132113 is 311231222113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178330533264 + 132891598849 = 422292^2 + 364543^2 .

It is a cyclic number.

It is not a de Polignac number, because 311222132113 - 2⁹ = 311222131601 is a prime.

It is not a weakly prime, because it can be changed into another prime (311222132213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155611066056 + 155611066057.

It is an arithmetic number, because the mean of its divisors is an integer number (155611066057).

Almost surely, 2^311222132113 is an apocalyptic number.

It is an amenable number.

311222132113 is a deficient number, since it is larger than the sum of its proper divisors (1).

311222132113 is an equidigital number, since it uses as much as digits as its factorization.

311222132113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 22.

Adding to 311222132113 its reverse (311231222113), we get a palindrome (622453354226).

The spelling of 311222132113 in words is "three hundred eleven billion, two hundred twenty-two million, one hundred thirty-two thousand, one hundred thirteen".