311123313311 has 4 divisors (see below), whose sum is σ = 311131216872. Its totient is φ = 311115409752.

The previous prime is 311123313251. The next prime is 311123313343. The reversal of 311123313311 is 113313321113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311123313311 - 2¹⁴ = 311123296927 is a prime.

It is a super-2 number, since 2×311123313311² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311123313211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3892436 + ... + 3971561.

It is an arithmetic number, because the mean of its divisors is an integer number (77782804218).

Almost surely, 2^311123313311 is an apocalyptic number.

311123313311 is a deficient number, since it is larger than the sum of its proper divisors (7903561).

311123313311 is an equidigital number, since it uses as much as digits as its factorization.

311123313311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7903560.

The product of its digits is 486, while the sum is 23.

Adding to 311123313311 its reverse (113313321113), we get a palindrome (424436634424).

The spelling of 311123313311 in words is "three hundred eleven billion, one hundred twenty-three million, three hundred thirteen thousand, three hundred eleven".