231142123 has 2 divisors, whose sum is σ = 231142124. Its totient is φ = 231142122.

The previous prime is 231142103. The next prime is 231142147. The reversal of 231142123 is 321241132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231142123 - 2⁵ = 231142091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231142123.

It is not a weakly prime, because it can be changed into another prime (231142103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115571061 + 115571062.

It is an arithmetic number, because the mean of its divisors is an integer number (115571062).

Almost surely, 2^231142123 is an apocalyptic number.

231142123 is a deficient number, since it is larger than the sum of its proper divisors (1).

231142123 is an equidigital number, since it uses as much as digits as its factorization.

231142123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 19.

The square root of 231142123 is about 15203.3589380768. The cubic root of 231142123 is about 613.7050532663.

Adding to 231142123 its reverse (321241132), we get a palindrome (552383255).

Subtracting 231142123 from its reverse (321241132), we obtain a palindrome (90099009).

The spelling of 231142123 in words is "two hundred thirty-one million, one hundred forty-two thousand, one hundred twenty-three".