123220230123121 has 4 divisors (see below), whose sum is σ = 123221636625652. Its totient is φ = 123218823620592.

The previous prime is 123220230123071. The next prime is 123220230123157. The reversal of 123220230123121 is 121321032022321.

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 111632748609600 + 11587481513521 = 10565640^2 + 3404039^2 .

It is a cyclic number.

It is not a de Polignac number, because 123220230123121 - 2²⁹ = 123219693252209 is a prime.

It is a super-2 number, since 2×123220230123121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123220230123421) 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, 703119846 + ... + 703295071.

It is an arithmetic number, because the mean of its divisors is an integer number (30805409156413).

Almost surely, 2^{123220230123121} is an apocalyptic number.

It is an amenable number.

123220230123121 is a deficient number, since it is larger than the sum of its proper divisors (1406502531).

123220230123121 is an equidigital number, since it uses as much as digits as its factorization.

123220230123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406502530.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 123220230123121 its reverse (121321032022321), we get a palindrome (244541262145442).

The spelling of 123220230123121 in words is "one hundred twenty-three trillion, two hundred twenty billion, two hundred thirty million, one hundred twenty-three thousand, one hundred twenty-one".