123201323129 has 2 divisors, whose sum is σ = 123201323130. Its totient is φ = 123201323128.

The previous prime is 123201323111. The next prime is 123201323131. The reversal of 123201323129 is 921323102321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78531655225 + 44669667904 = 280235^2 + 211352^2 .

It is a cyclic number.

It is not a de Polignac number, because 123201323129 - 2¹⁶ = 123201257593 is a prime.

Together with 123201323131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123201323429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61600661564 + 61600661565.

It is an arithmetic number, because the mean of its divisors is an integer number (61600661565).

Almost surely, 2^123201323129 is an apocalyptic number.

It is an amenable number.

123201323129 is a deficient number, since it is larger than the sum of its proper divisors (1).

123201323129 is an equidigital number, since it uses as much as digits as its factorization.

123201323129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 123201323129 in words is "one hundred twenty-three billion, two hundred one million, three hundred twenty-three thousand, one hundred twenty-nine".