231118123 has 2 divisors, whose sum is σ = 231118124. Its totient is φ = 231118122.

The previous prime is 231118061. The next prime is 231118133. The reversal of 231118123 is 321811132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231118123 - 2¹⁷ = 230987051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231118094 and 231118103.

It is not a weakly prime, because it can be changed into another prime (231118133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115559061 + 115559062.

It is an arithmetic number, because the mean of its divisors is an integer number (115559062).

Almost surely, 2^231118123 is an apocalyptic number.

231118123 is a deficient number, since it is larger than the sum of its proper divisors (1).

231118123 is an equidigital number, since it uses as much as digits as its factorization.

231118123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 22.

The square root of 231118123 is about 15202.5696183244. The cubic root of 231118123 is about 613.6838117448.

Adding to 231118123 its reverse (321811132), we get a palindrome (552929255).

The spelling of 231118123 in words is "two hundred thirty-one million, one hundred eighteen thousand, one hundred twenty-three".