123121320220101 has 16 divisors (see below), whose sum is σ = 193665486798848. Its totient is φ = 68085522702000.

The previous prime is 123121320220069. The next prime is 123121320220181. The reversal of 123121320220101 is 101022023121321.

It is not a de Polignac number, because 123121320220101 - 2⁵ = 123121320220069 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123121320220181) 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, 94563225325 + ... + 94563226626.

It is an arithmetic number, because the mean of its divisors is an integer number (12104092924928).

Almost surely, 2^{123121320220101} is an apocalyptic number.

It is an amenable number.

123121320220101 is a deficient number, since it is larger than the sum of its proper divisors (70544166578747).

123121320220101 is a wasteful number, since it uses less digits than its factorization.

123121320220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189126451992.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 123121320220101 its reverse (101022023121321), we get a palindrome (224143343341422).

The spelling of 123121320220101 in words is "one hundred twenty-three trillion, one hundred twenty-one billion, three hundred twenty million, two hundred twenty thousand, one hundred one".