311313101231 has 4 divisors (see below), whose sum is σ = 339614292264. Its totient is φ = 283011910200.

The previous prime is 311313101213. The next prime is 311313101291. The reversal of 311313101231 is 132101313113.

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 311313101231 - 2²⁶ = 311245992367 is a prime.

It is a super-2 number, since 2×311313101231² (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 (311313101291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14150595500 + ... + 14150595521.

It is an arithmetic number, because the mean of its divisors is an integer number (84903573066).

Almost surely, 2^311313101231 is an apocalyptic number.

311313101231 is a deficient number, since it is larger than the sum of its proper divisors (28301191033).

311313101231 is a wasteful number, since it uses less digits than its factorization.

311313101231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28301191032.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 311313101231 its reverse (132101313113), we get a palindrome (443414414344).

The spelling of 311313101231 in words is "three hundred eleven billion, three hundred thirteen million, one hundred one thousand, two hundred thirty-one".