123240344143 has 4 divisors (see below), whose sum is σ = 140846107600. Its totient is φ = 105634580688.

The previous prime is 123240344111. The next prime is 123240344167. The reversal of 123240344143 is 341443042321.

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

It is not a de Polignac number, because 123240344143 - 2⁵ = 123240344111 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 (123240347143) 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, 8802881718 + ... + 8802881731.

It is an arithmetic number, because the mean of its divisors is an integer number (35211526900).

Almost surely, 2^123240344143 is an apocalyptic number.

123240344143 is a deficient number, since it is larger than the sum of its proper divisors (17605763457).

123240344143 is an equidigital number, since it uses as much as digits as its factorization.

123240344143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17605763456.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 123240344143 its reverse (341443042321), we get a palindrome (464683386464).

The spelling of 123240344143 in words is "one hundred twenty-three billion, two hundred forty million, three hundred forty-four thousand, one hundred forty-three".