123001222522421 has 4 divisors (see below), whose sum is σ = 126969003894144. Its totient is φ = 119033441150700.

The previous prime is 123001222522349. The next prime is 123001222522457. The reversal of 123001222522421 is 124225222100321.

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 a cyclic number.

It is not a de Polignac number, because 123001222522421 - 2¹⁸ = 123001222260277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123001222522721) 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, 1983890685815 + ... + 1983890685876.

It is an arithmetic number, because the mean of its divisors is an integer number (31742250973536).

Almost surely, 2^{123001222522421} is an apocalyptic number.

It is an amenable number.

123001222522421 is a deficient number, since it is larger than the sum of its proper divisors (3967781371723).

123001222522421 is an equidigital number, since it uses as much as digits as its factorization.

123001222522421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3967781371722.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 123001222522421 its reverse (124225222100321), we get a palindrome (247226444622742).

The spelling of 123001222522421 in words is "one hundred twenty-three trillion, one billion, two hundred twenty-two million, five hundred twenty-two thousand, four hundred twenty-one".