311321211211 has 2 divisors, whose sum is σ = 311321211212. Its totient is φ = 311321211210.

The previous prime is 311321211199. The next prime is 311321211217. The reversal of 311321211211 is 112112123113.

It is a strong prime.

It is an emirp because it is prime and its reverse (112112123113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311321211211 - 2⁷ = 311321211083 is a prime.

It is not a weakly prime, because it can be changed into another prime (311321211217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155660605605 + 155660605606.

It is an arithmetic number, because the mean of its divisors is an integer number (155660605606).

Almost surely, 2^311321211211 is an apocalyptic number.

311321211211 is a deficient number, since it is larger than the sum of its proper divisors (1).

311321211211 is an equidigital number, since it uses as much as digits as its factorization.

311321211211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 19.

Adding to 311321211211 its reverse (112112123113), we get a palindrome (423433334324).

The spelling of 311321211211 in words is "three hundred eleven billion, three hundred twenty-one million, two hundred eleven thousand, two hundred eleven".