123001220220123 has 16 divisors (see below), whose sum is σ = 187507785586176. Its totient is φ = 70257403513920.

The previous prime is 123001220220107. The next prime is 123001220220133. The reversal of 123001220220123 is 321022022100321.

It is not a de Polignac number, because 123001220220123 - 2⁴ = 123001220220107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 123001220220123.

It is not an unprimeable number, because it can be changed into a prime (123001220220133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1208616258 + ... + 1208718023.

It is an arithmetic number, because the mean of its divisors is an integer number (11719236599136).

Almost surely, 2^{123001220220123} is an apocalyptic number.

123001220220123 is a deficient number, since it is larger than the sum of its proper divisors (64506565366053).

123001220220123 is a wasteful number, since it uses less digits than its factorization.

123001220220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417336714.

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

Adding to 123001220220123 its reverse (321022022100321), we get a palindrome (444023242320444).

The spelling of 123001220220123 in words is "one hundred twenty-three trillion, one billion, two hundred twenty million, two hundred twenty thousand, one hundred twenty-three".