123231223189 has 2 divisors, whose sum is σ = 123231223190. Its totient is φ = 123231223188.

The previous prime is 123231223153. The next prime is 123231223217. The reversal of 123231223189 is 981322132321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80389260900 + 42841962289 = 283530^2 + 206983^2 .

It is a cyclic number.

It is not a de Polignac number, because 123231223189 - 2²¹ = 123229126037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123231223589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61615611594 + 61615611595.

It is an arithmetic number, because the mean of its divisors is an integer number (61615611595).

Almost surely, 2^123231223189 is an apocalyptic number.

It is an amenable number.

123231223189 is a deficient number, since it is larger than the sum of its proper divisors (1).

123231223189 is an equidigital number, since it uses as much as digits as its factorization.

123231223189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The spelling of 123231223189 in words is "one hundred twenty-three billion, two hundred thirty-one million, two hundred twenty-three thousand, one hundred eighty-nine".