123342042443423 has 4 divisors (see below), whose sum is σ = 123821972569920. Its totient is φ = 122862112316928.

The previous prime is 123342042443309. The next prime is 123342042443441. The reversal of 123342042443423 is 324344240243321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 123342042443423 - 2²² = 123342038249119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123342042440423) 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, 239965062863 + ... + 239965063376.

It is an arithmetic number, because the mean of its divisors is an integer number (30955493142480).

Almost surely, 2^{123342042443423} is an apocalyptic number.

123342042443423 is a deficient number, since it is larger than the sum of its proper divisors (479930126497).

123342042443423 is an equidigital number, since it uses as much as digits as its factorization.

123342042443423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479930126496.

The product of its (nonzero) digits is 1327104, while the sum is 41.

Adding to 123342042443423 its reverse (324344240243321), we get a palindrome (447686282686744).

The spelling of 123342042443423 in words is "one hundred twenty-three trillion, three hundred forty-two billion, forty-two million, four hundred forty-three thousand, four hundred twenty-three".