123320232137 has 2 divisors, whose sum is σ = 123320232138. Its totient is φ = 123320232136.

The previous prime is 123320232109. The next prime is 123320232173. The reversal of 123320232137 is 731232023321.

It is a happy number.

Together with next prime (123320232173) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69711312841 + 53608919296 = 264029^2 + 231536^2 .

It is an emirp because it is prime and its reverse (731232023321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123320232137 - 2³⁴ = 106140362953 is a prime.

It is not a weakly prime, because it can be changed into another prime (123320232337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61660116068 + 61660116069.

It is an arithmetic number, because the mean of its divisors is an integer number (61660116069).

Almost surely, 2^123320232137 is an apocalyptic number.

It is an amenable number.

123320232137 is a deficient number, since it is larger than the sum of its proper divisors (1).

123320232137 is an equidigital number, since it uses as much as digits as its factorization.

123320232137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 29.

Adding to 123320232137 its reverse (731232023321), we get a palindrome (854552255458).

The spelling of 123320232137 in words is "one hundred twenty-three billion, three hundred twenty million, two hundred thirty-two thousand, one hundred thirty-seven".