311112011310031 has 4 divisors (see below), whose sum is σ = 312035192352832. Its totient is φ = 310188830267232.

The previous prime is 311112011309987. The next prime is 311112011310043. The reversal of 311112011310031 is 130013110211113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311112011310031 is a prime.

It is a super-2 number, since 2×311112011310031² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311112011309990 and 311112011310008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311112011380031) 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, 461590520895 + ... + 461590521568.

It is an arithmetic number, because the mean of its divisors is an integer number (78008798088208).

Almost surely, 2^{311112011310031} is an apocalyptic number.

311112011310031 is a deficient number, since it is larger than the sum of its proper divisors (923181042801).

311112011310031 is an equidigital number, since it uses as much as digits as its factorization.

311112011310031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923181042800.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 311112011310031 its reverse (130013110211113), we get a palindrome (441125121521144).

The spelling of 311112011310031 in words is "three hundred eleven trillion, one hundred twelve billion, eleven million, three hundred ten thousand, thirty-one".