311123303111 has 2 divisors, whose sum is σ = 311123303112. Its totient is φ = 311123303110.

The previous prime is 311123303081. The next prime is 311123303131. The reversal of 311123303111 is 111303321113.

It is an a-pointer prime, because the next prime (311123303131) can be obtained adding 311123303111 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311123303111 - 2³⁸ = 36245396167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311123303131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155561651555 + 155561651556.

It is an arithmetic number, because the mean of its divisors is an integer number (155561651556).

Almost surely, 2^311123303111 is an apocalyptic number.

311123303111 is a deficient number, since it is larger than the sum of its proper divisors (1).

311123303111 is an equidigital number, since it uses as much as digits as its factorization.

311123303111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 311123303111 its reverse (111303321113), we get a palindrome (422426624224).

The spelling of 311123303111 in words is "three hundred eleven billion, one hundred twenty-three million, three hundred three thousand, one hundred eleven".