123120113317 has 2 divisors, whose sum is σ = 123120113318. Its totient is φ = 123120113316.

The previous prime is 123120113287. The next prime is 123120113327. The reversal of 123120113317 is 713311021321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121052501476 + 2067611841 = 347926^2 + 45471^2 .

It is a cyclic number.

It is not a de Polignac number, because 123120113317 - 2¹¹ = 123120111269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123120113291 and 123120113300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123120113327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61560056658 + 61560056659.

It is an arithmetic number, because the mean of its divisors is an integer number (61560056659).

Almost surely, 2^123120113317 is an apocalyptic number.

It is an amenable number.

123120113317 is a deficient number, since it is larger than the sum of its proper divisors (1).

123120113317 is an equidigital number, since it uses as much as digits as its factorization.

123120113317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

Adding to 123120113317 its reverse (713311021321), we get a palindrome (836431134638).

The spelling of 123120113317 in words is "one hundred twenty-three billion, one hundred twenty million, one hundred thirteen thousand, three hundred seventeen".