123142042243 has 16 divisors (see below), whose sum is σ = 138209556096. Its totient is φ = 108765771840.

The previous prime is 123142042237. The next prime is 123142042253. The reversal of 123142042243 is 342240241321.

It is not a de Polignac number, because 123142042243 - 2²⁹ = 122605171331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123142042213) 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, 1090621 + ... + 1198222.

It is an arithmetic number, because the mean of its divisors is an integer number (8638097256).

Almost surely, 2^123142042243 is an apocalyptic number.

123142042243 is a deficient number, since it is larger than the sum of its proper divisors (15067513853).

123142042243 is a wasteful number, since it uses less digits than its factorization.

123142042243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288994.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 123142042243 its reverse (342240241321), we get a palindrome (465382283564).

The spelling of 123142042243 in words is "one hundred twenty-three billion, one hundred forty-two million, forty-two thousand, two hundred forty-three".