123312220231 has 2 divisors, whose sum is σ = 123312220232. Its totient is φ = 123312220230.

The previous prime is 123312220211. The next prime is 123312220261. The reversal of 123312220231 is 132022213321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123312220231 - 2⁷ = 123312220103 is a prime.

It is a super-2 number, since 2×123312220231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123312220201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61656110115 + 61656110116.

It is an arithmetic number, because the mean of its divisors is an integer number (61656110116).

Almost surely, 2^123312220231 is an apocalyptic number.

123312220231 is a deficient number, since it is larger than the sum of its proper divisors (1).

123312220231 is an equidigital number, since it uses as much as digits as its factorization.

123312220231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 123312220231 its reverse (132022213321), we get a palindrome (255334433552).

The spelling of 123312220231 in words is "one hundred twenty-three billion, three hundred twelve million, two hundred twenty thousand, two hundred thirty-one".