123120113321 has 12 divisors (see below), whose sum is σ = 127802875200. Its totient is φ = 118603451568.

The previous prime is 123120113317. The next prime is 123120113327. The reversal of 123120113321 is 123311021321.

It is a happy number.

It is not a de Polignac number, because 123120113321 - 2² = 123120113317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123120113293 and 123120113302.

It is not an unprimeable number, because it can be changed into a prime (123120113327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202460 + ... + 535938.

It is an arithmetic number, because the mean of its divisors is an integer number (10650239600).

Almost surely, 2^123120113321 is an apocalyptic number.

It is an amenable number.

123120113321 is a deficient number, since it is larger than the sum of its proper divisors (4682761879).

123120113321 is an equidigital number, since it uses as much as digits as its factorization.

123120113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333976 (or 333947 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 123120113321 its reverse (123311021321), we get a palindrome (246431134642).

The spelling of 123120113321 in words is "one hundred twenty-three billion, one hundred twenty million, one hundred thirteen thousand, three hundred twenty-one".