123031222221121 has 4 divisors (see below), whose sum is σ = 123035946767044. Its totient is φ = 123026497675200.

The previous prime is 123031222221101. The next prime is 123031222221133. The reversal of 123031222221121 is 121122222130321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86412566938896 + 36618655282225 = 9295836^2 + 6051335^2 .

It is a cyclic number.

It is not a de Polignac number, because 123031222221121 - 2⁹ = 123031222220609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123031222221101) 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, 2362233900 + ... + 2362285981.

It is an arithmetic number, because the mean of its divisors is an integer number (30758986691761).

Almost surely, 2^{123031222221121} is an apocalyptic number.

It is an amenable number.

123031222221121 is a deficient number, since it is larger than the sum of its proper divisors (4724545923).

123031222221121 is an equidigital number, since it uses as much as digits as its factorization.

123031222221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4724545922.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 123031222221121 its reverse (121122222130321), we get a palindrome (244153444351442).

The spelling of 123031222221121 in words is "one hundred twenty-three trillion, thirty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".