311120203231 has 2 divisors, whose sum is σ = 311120203232. Its totient is φ = 311120203230.

The previous prime is 311120203223. The next prime is 311120203237. The reversal of 311120203231 is 132302021113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311120203231 - 2³ = 311120203223 is a prime.

It is a super-2 number, since 2×311120203231² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311120203199 and 311120203208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311120203237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155560101615 + 155560101616.

It is an arithmetic number, because the mean of its divisors is an integer number (155560101616).

Almost surely, 2^311120203231 is an apocalyptic number.

311120203231 is a deficient number, since it is larger than the sum of its proper divisors (1).

311120203231 is an equidigital number, since it uses as much as digits as its factorization.

311120203231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 311120203231 its reverse (132302021113), we get a palindrome (443422224344).

The spelling of 311120203231 in words is "three hundred eleven billion, one hundred twenty million, two hundred three thousand, two hundred thirty-one".