123112142430221 has 16 divisors (see below), whose sum is σ = 141231367557120. Its totient is φ = 105125930786160.

The previous prime is 123112142430187. The next prime is 123112142430227. The reversal of 123112142430221 is 122034241211321.

It is a cyclic number.

It is not a de Polignac number, because 123112142430221 - 2³⁸ = 122837264523277 is a prime.

It is a super-2 number, since 2×123112142430221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123112142430227) 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, 18433190 + ... + 24207576.

It is an arithmetic number, because the mean of its divisors is an integer number (8826960472320).

Almost surely, 2^{123112142430221} is an apocalyptic number.

It is an amenable number.

123112142430221 is a deficient number, since it is larger than the sum of its proper divisors (18119225126899).

123112142430221 is a wasteful number, since it uses less digits than its factorization.

123112142430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5785904.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 123112142430221 its reverse (122034241211321), we get a palindrome (245146383641542).

The spelling of 123112142430221 in words is "one hundred twenty-three trillion, one hundred twelve billion, one hundred forty-two million, four hundred thirty thousand, two hundred twenty-one".