123201122001021 has 12 divisors (see below), whose sum is σ = 177957382233280. Its totient is φ = 82133986252680.

The previous prime is 123201122000993. The next prime is 123201122001103. The reversal of 123201122001021 is 120100221102321.

123201122001021 is a `hidden beast` number, since 1 + 2 + 320 + 112 + 200 + 10 + 21 = 666.

It is not a de Polignac number, because 123201122001021 - 2¹³ = 123201121992829 is a prime.

It is a super-2 number, since 2×123201122001021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123201122000985 and 123201122001003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123201122501021) 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, 786906 + ... + 15716916.

Almost surely, 2^{123201122001021} is an apocalyptic number.

It is an amenable number.

123201122001021 is a deficient number, since it is larger than the sum of its proper divisors (54756260232259).

123201122001021 is a wasteful number, since it uses less digits than its factorization.

123201122001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15846896 (or 15846893 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 123201122001021 its reverse (120100221102321), we get a palindrome (243301343103342).

The spelling of 123201122001021 in words is "one hundred twenty-three trillion, two hundred one billion, one hundred twenty-two million, one thousand, twenty-one".