123220231 has 2 divisors, whose sum is σ = 123220232. Its totient is φ = 123220230.

The previous prime is 123220219. The next prime is 123220259. The reversal of 123220231 is 132022321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123220231 - 2⁷ = 123220103 is a prime.

It is a super-2 number, since 2×123220231² = 30366450655386722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123220831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61610115 + 61610116.

It is an arithmetic number, because the mean of its divisors is an integer number (61610116).

Almost surely, 2^123220231 is an apocalyptic number.

123220231 is a deficient number, since it is larger than the sum of its proper divisors (1).

123220231 is an equidigital number, since it uses as much as digits as its factorization.

123220231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 123220231 is about 11100.4608462892. The cubic root of 123220231 is about 497.6156222263.

Adding to 123220231 its reverse (132022321), we get a palindrome (255242552).

The spelling of 123220231 in words is "one hundred twenty-three million, two hundred twenty thousand, two hundred thirty-one".