123401220317 has 2 divisors, whose sum is σ = 123401220318. Its totient is φ = 123401220316.

The previous prime is 123401220307. The next prime is 123401220359. The reversal of 123401220317 is 713022104321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118139313796 + 5261906521 = 343714^2 + 72539^2 .

It is a cyclic number.

It is not a de Polignac number, because 123401220317 - 2²⁸ = 123132784861 is a prime.

It is a super-2 number, since 2×123401220317² (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 (123401220307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61700610158 + 61700610159.

It is an arithmetic number, because the mean of its divisors is an integer number (61700610159).

Almost surely, 2^123401220317 is an apocalyptic number.

It is an amenable number.

123401220317 is a deficient number, since it is larger than the sum of its proper divisors (1).

123401220317 is an equidigital number, since it uses as much as digits as its factorization.

123401220317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 123401220317 its reverse (713022104321), we get a palindrome (836423324638).

The spelling of 123401220317 in words is "one hundred twenty-three billion, four hundred one million, two hundred twenty thousand, three hundred seventeen".