113221231231 has 2 divisors, whose sum is σ = 113221231232. Its totient is φ = 113221231230.

The previous prime is 113221231229. The next prime is 113221231237. The reversal of 113221231231 is 132132122311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 113221231231 - 2¹ = 113221231229 is a prime.

It is a super-2 number, since 2×113221231231² (a number of 23 digits) contains 22 as substring.

Together with 113221231229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113221231237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56610615615 + 56610615616.

It is an arithmetic number, because the mean of its divisors is an integer number (56610615616).

Almost surely, 2^113221231231 is an apocalyptic number.

113221231231 is a deficient number, since it is larger than the sum of its proper divisors (1).

113221231231 is an equidigital number, since it uses as much as digits as its factorization.

113221231231 is an evil number, because the sum of its binary digits is even.

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

Adding to 113221231231 its reverse (132132122311), we get a palindrome (245353353542).

The spelling of 113221231231 in words is "one hundred thirteen billion, two hundred twenty-one million, two hundred thirty-one thousand, two hundred thirty-one".