311013020331131 has 4 divisors (see below), whose sum is σ = 316881190526112. Its totient is φ = 305144850136152.

The previous prime is 311013020331067. The next prime is 311013020331149. The reversal of 311013020331131 is 131133020310113.

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 311013020331131 - 2⁶ = 311013020331067 is a prime.

It is a super-2 number, since 2×311013020331131² (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 = 311013020331097 and 311013020331106.

It is not an unprimeable number, because it can be changed into a prime (311013029331131) 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, 2934085097411 + ... + 2934085097516.

It is an arithmetic number, because the mean of its divisors is an integer number (79220297631528).

Almost surely, 2^{311013020331131} is an apocalyptic number.

311013020331131 is a deficient number, since it is larger than the sum of its proper divisors (5868170194981).

311013020331131 is an equidigital number, since it uses as much as digits as its factorization.

311013020331131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5868170194980.

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

Adding to 311013020331131 its reverse (131133020310113), we get a palindrome (442146040641244).

The spelling of 311013020331131 in words is "three hundred eleven trillion, thirteen billion, twenty million, three hundred thirty-one thousand, one hundred thirty-one".