123320231 has 2 divisors, whose sum is σ = 123320232. Its totient is φ = 123320230.

The previous prime is 123320221. The next prime is 123320243. The reversal of 123320231 is 132023321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123320231 is a prime.

It is a super-2 number, since 2×123320231² = 30415758747786722, 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 (123320221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61660115 + 61660116.

It is an arithmetic number, because the mean of its divisors is an integer number (61660116).

Almost surely, 2^123320231 is an apocalyptic number.

123320231 is a deficient number, since it is larger than the sum of its proper divisors (1).

123320231 is an equidigital number, since it uses as much as digits as its factorization.

123320231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 123320231 is about 11104.9642502801. The cubic root of 123320231 is about 497.7501999832.

Adding to 123320231 its reverse (132023321), we get a palindrome (255343552).

The spelling of 123320231 in words is "one hundred twenty-three million, three hundred twenty thousand, two hundred thirty-one".