123001220131021 has 4 divisors (see below), whose sum is σ = 123046658338432. Its totient is φ = 122955781923612.

The previous prime is 123001220131001. The next prime is 123001220131051. The reversal of 123001220131021 is 120131022100321.

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 123001220131021 - 2³⁵ = 122966860392653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123001220131021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123001220131001) 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, 22719099645 + ... + 22719105058.

It is an arithmetic number, because the mean of its divisors is an integer number (30761664584608).

Almost surely, 2^{123001220131021} is an apocalyptic number.

It is an amenable number.

123001220131021 is a deficient number, since it is larger than the sum of its proper divisors (45438207411).

123001220131021 is an equidigital number, since it uses as much as digits as its factorization.

123001220131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45438207410.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123001220131021 its reverse (120131022100321), we get a palindrome (243132242231342).

The spelling of 123001220131021 in words is "one hundred twenty-three trillion, one billion, two hundred twenty million, one hundred thirty-one thousand, twenty-one".