12343220042 has 4 divisors (see below), whose sum is σ = 18514830066. Its totient is φ = 6171610020.

The previous prime is 12343220011. The next prime is 12343220069. The reversal of 12343220042 is 24002234321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24002234321 = 13 ⋅1846325717.

It can be written as a sum of positive squares in only one way, i.e., 9639116041 + 2704104001 = 98179^2 + 52001^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3085805009 + ... + 3085805012.

Almost surely, 2^12343220042 is an apocalyptic number.

12343220042 is a deficient number, since it is larger than the sum of its proper divisors (6171610024).

12343220042 is an equidigital number, since it uses as much as digits as its factorization.

12343220042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171610023.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 12343220042 its reverse (24002234321), we get a palindrome (36345454363).

The spelling of 12343220042 in words is "twelve billion, three hundred forty-three million, two hundred twenty thousand, forty-two".