123120002232021 has 4 divisors (see below), whose sum is σ = 164160002976032. Its totient is φ = 82080001488012.

The previous prime is 123120002232001. The next prime is 123120002232083. The reversal of 123120002232021 is 120232200021321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 123120002232021 - 2¹⁵ = 123120002199253 is a prime.

It is a super-2 number, since 2×123120002232021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123120002232001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20520000372001 + ... + 20520000372006.

It is an arithmetic number, because the mean of its divisors is an integer number (41040000744008).

Almost surely, 2^{123120002232021} is an apocalyptic number.

It is an amenable number.

123120002232021 is a deficient number, since it is larger than the sum of its proper divisors (41040000744011).

123120002232021 is an equidigital number, since it uses as much as digits as its factorization.

123120002232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41040000744010.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 123120002232021 its reverse (120232200021321), we get a palindrome (243352202253342).

The spelling of 123120002232021 in words is "one hundred twenty-three trillion, one hundred twenty billion, two million, two hundred thirty-two thousand, twenty-one".