231012123 has 4 divisors (see below), whose sum is σ = 308016168. Its totient is φ = 154008080.

The previous prime is 231012113. The next prime is 231012143. The reversal of 231012123 is 321210132.

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 231012123 - 2⁵ = 231012091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231012113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38502018 + ... + 38502023.

It is an arithmetic number, because the mean of its divisors is an integer number (77004042).

Almost surely, 2^231012123 is an apocalyptic number.

231012123 is a deficient number, since it is larger than the sum of its proper divisors (77004045).

231012123 is an equidigital number, since it uses as much as digits as its factorization.

231012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77004044.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231012123 is about 15199.0829657582. The cubic root of 231012123 is about 613.5899774309.

Adding to 231012123 its reverse (321210132), we get a palindrome (552222255).

The spelling of 231012123 in words is "two hundred thirty-one million, twelve thousand, one hundred twenty-three".