311101320431 has 16 divisors (see below), whose sum is σ = 351878808960. Its totient is φ = 272450461920.

The previous prime is 311101320421. The next prime is 311101320437. The reversal of 311101320431 is 134023101113.

It is a cyclic number.

It is not a de Polignac number, because 311101320431 - 2²⁶ = 311034211567 is a prime.

It is a super-2 number, since 2×311101320431² (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 (311101320437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 959405 + ... + 1242038.

It is an arithmetic number, because the mean of its divisors is an integer number (21992425560).

Almost surely, 2^311101320431 is an apocalyptic number.

311101320431 is a deficient number, since it is larger than the sum of its proper divisors (40777488529).

311101320431 is a wasteful number, since it uses less digits than its factorization.

311101320431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201926.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 311101320431 its reverse (134023101113), we get a palindrome (445124421544).

The spelling of 311101320431 in words is "three hundred eleven billion, one hundred one million, three hundred twenty thousand, four hundred thirty-one".