123243423241421 has 8 divisors (see below), whose sum is σ = 140853399247680. Its totient is φ = 105634390406688.

The previous prime is 123243423241397. The next prime is 123243423241429. The reversal of 123243423241421 is 124142324342321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123243423241421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123243423241429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235512851 + ... + 236035568.

It is an arithmetic number, because the mean of its divisors is an integer number (17606674905960).

Almost surely, 2^{123243423241421} is an apocalyptic number.

It is an amenable number.

123243423241421 is a deficient number, since it is larger than the sum of its proper divisors (17609976006259).

123243423241421 is an equidigital number, since it uses as much as digits as its factorization.

123243423241421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471585763.

The product of its digits is 221184, while the sum is 38.

Adding to 123243423241421 its reverse (124142324342321), we get a palindrome (247385747583742).

The spelling of 123243423241421 in words is "one hundred twenty-three trillion, two hundred forty-three billion, four hundred twenty-three million, two hundred forty-one thousand, four hundred twenty-one".