313211221231 has 4 divisors (see below), whose sum is σ = 324011608200. Its totient is φ = 302410834264.

The previous prime is 313211221201. The next prime is 313211221241. The reversal of 313211221231 is 132122112313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132122112313 = 31 ⋅4262003623.

It is a cyclic number.

It is not a de Polignac number, because 313211221231 - 2²³ = 313202832623 is a prime.

It is a super-2 number, since 2×313211221231² (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 (313211221201) 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, 5400193441 + ... + 5400193498.

It is an arithmetic number, because the mean of its divisors is an integer number (81002902050).

Almost surely, 2^313211221231 is an apocalyptic number.

313211221231 is a deficient number, since it is larger than the sum of its proper divisors (10800386969).

313211221231 is a wasteful number, since it uses less digits than its factorization.

313211221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10800386968.

The product of its digits is 432, while the sum is 22.

Adding to 313211221231 its reverse (132122112313), we get a palindrome (445333333544).

The spelling of 313211221231 in words is "three hundred thirteen billion, two hundred eleven million, two hundred twenty-one thousand, two hundred thirty-one".