123210110021121 has 24 divisors (see below), whose sum is σ = 179439267231744. Its totient is φ = 81462512073600.

The previous prime is 123210110021083. The next prime is 123210110021171. The reversal of 123210110021121 is 121120011012321.

It is a happy number.

123210110021121 is a `hidden beast` number, since 1 + 2 + 321 + 0 + 110 + 0 + 211 + 21 = 666.

It is not a de Polignac number, because 123210110021121 - 2²⁷ = 123209975803393 is a prime.

It is a super-2 number, since 2×123210110021121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123210110021094 and 123210110021103.

It is not an unprimeable number, because it can be changed into a prime (123210110021171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17336280 + ... + 23387321.

It is an arithmetic number, because the mean of its divisors is an integer number (7476636134656).

Almost surely, 2^{123210110021121} is an apocalyptic number.

It is an amenable number.

123210110021121 is a deficient number, since it is larger than the sum of its proper divisors (56229157210623).

123210110021121 is a wasteful number, since it uses less digits than its factorization.

123210110021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40726381 (or 40726378 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 123210110021121 its reverse (121120011012321), we get a palindrome (244330121033442).

The spelling of 123210110021121 in words is "one hundred twenty-three trillion, two hundred ten billion, one hundred ten million, twenty-one thousand, one hundred twenty-one".