123221231 has 6 divisors (see below), whose sum is σ = 143339040. Its totient is φ = 105618156.

The previous prime is 123221221. The next prime is 123221291. The reversal of 123221231 is 132122321.

It is not a de Polignac number, because 123221231 - 2¹⁸ = 122959087 is a prime.

It is a super-2 number, since 2×123221231² = 30366943538310722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1257311 + ... + 1257408.

It is an arithmetic number, because the mean of its divisors is an integer number (23889840).

Almost surely, 2^123221231 is an apocalyptic number.

123221231 is a deficient number, since it is larger than the sum of its proper divisors (20117809).

123221231 is an equidigital number, since it uses as much as digits as its factorization.

123221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514733 (or 2514726 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 123221231 is about 11100.5058893728. The cubic root of 123221231 is about 497.6169683643.

Adding to 123221231 its reverse (132122321), we get a palindrome (255343552).

The spelling of 123221231 in words is "one hundred twenty-three million, two hundred twenty-one thousand, two hundred thirty-one".