123220300231021 has 4 divisors (see below), whose sum is σ = 140823200264032. Its totient is φ = 105617400198012.

The previous prime is 123220300230949. The next prime is 123220300231031. The reversal of 123220300231021 is 120132003022321.

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 123220300231021 - 2²⁷ = 123220166013293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123220300230983 and 123220300231001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123220300231031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8801450016495 + ... + 8801450016508.

It is an arithmetic number, because the mean of its divisors is an integer number (35205800066008).

Almost surely, 2^{123220300231021} is an apocalyptic number.

It is an amenable number.

123220300231021 is a deficient number, since it is larger than the sum of its proper divisors (17602900033011).

123220300231021 is an equidigital number, since it uses as much as digits as its factorization.

123220300231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17602900033010.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 123220300231021 its reverse (120132003022321), we get a palindrome (243352303253342).

The spelling of 123220300231021 in words is "one hundred twenty-three trillion, two hundred twenty billion, three hundred million, two hundred thirty-one thousand, twenty-one".