311122100231 has 2 divisors, whose sum is σ = 311122100232. Its totient is φ = 311122100230.

The previous prime is 311122100227. The next prime is 311122100293. The reversal of 311122100231 is 132001221113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311122100231 - 2² = 311122100227 is a prime.

It is a super-2 number, since 2×311122100231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311122102231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155561050115 + 155561050116.

It is an arithmetic number, because the mean of its divisors is an integer number (155561050116).

Almost surely, 2^311122100231 is an apocalyptic number.

311122100231 is a deficient number, since it is larger than the sum of its proper divisors (1).

311122100231 is an equidigital number, since it uses as much as digits as its factorization.

311122100231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 311122100231 its reverse (132001221113), we get a palindrome (443123321344).

The spelling of 311122100231 in words is "three hundred eleven billion, one hundred twenty-two million, one hundred thousand, two hundred thirty-one".