123100231 has 2 divisors, whose sum is σ = 123100232. Its totient is φ = 123100230.

The previous prime is 123100223. The next prime is 123100253. The reversal of 123100231 is 132001321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123100231 - 2³ = 123100223 is a prime.

It is a super-2 number, since 2×123100231² = 30307333744506722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123104231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61550115 + 61550116.

It is an arithmetic number, because the mean of its divisors is an integer number (61550116).

Almost surely, 2^123100231 is an apocalyptic number.

123100231 is a deficient number, since it is larger than the sum of its proper divisors (1).

123100231 is an equidigital number, since it uses as much as digits as its factorization.

123100231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 123100231 is about 11095.0543486727. The cubic root of 123100231 is about 497.4540327722.

Adding to 123100231 its reverse (132001321), we get a palindrome (255101552).

The spelling of 123100231 in words is "one hundred twenty-three million, one hundred thousand, two hundred thirty-one".