123343129105921 has 8 divisors (see below), whose sum is σ = 124015126126464. Its totient is φ = 122671471399680.

The previous prime is 123343129105877. The next prime is 123343129105961. The reversal of 123343129105921 is 129501921343321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123343129105921 - 2¹⁹ = 123343128581633 is a prime.

It is a super-2 number, since 2×123343129105921² (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 (123343129105961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84099565 + ... + 85553626.

It is an arithmetic number, because the mean of its divisors is an integer number (15501890765808).

Almost surely, 2^{123343129105921} is an apocalyptic number.

It is an amenable number.

123343129105921 is a deficient number, since it is larger than the sum of its proper divisors (671997020543).

123343129105921 is a wasteful number, since it uses less digits than its factorization.

123343129105921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169657151.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 123343129105921 in words is "one hundred twenty-three trillion, three hundred forty-three billion, one hundred twenty-nine million, one hundred five thousand, nine hundred twenty-one".