123201321321123 has 12 divisors (see below), whose sum is σ = 178024390627720. Its totient is φ = 82103325061536.

The previous prime is 123201321321121. The next prime is 123201321321227. The reversal of 123201321321123 is 321123123102321.

123201321321123 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 0 + 1 + 321 + 321 + 12 + 3 = 666.

It is not a de Polignac number, because 123201321321123 - 2¹ = 123201321321121 is a prime.

It is a super-2 number, since 2×123201321321123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123201321321121) 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, 2574070786 + ... + 2574118647.

Almost surely, 2^{123201321321123} is an apocalyptic number.

123201321321123 is a deficient number, since it is larger than the sum of its proper divisors (54823069306597).

123201321321123 is a wasteful number, since it uses less digits than its factorization.

123201321321123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5148192098 (or 5148192095 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 123201321321123 its reverse (321123123102321), we get a palindrome (444324444423444).

The spelling of 123201321321123 in words is "one hundred twenty-three trillion, two hundred one billion, three hundred twenty-one million, three hundred twenty-one thousand, one hundred twenty-three".