12423244142 has 4 divisors (see below), whose sum is σ = 18634866216. Its totient is φ = 6211622070.

The previous prime is 12423244129. The next prime is 12423244147. The reversal of 12423244142 is 24144232421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24144232421 = 59053 ⋅408857.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423244147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3105811034 + ... + 3105811037.

It is an arithmetic number, because the mean of its divisors is an integer number (4658716554).

Almost surely, 2^12423244142 is an apocalyptic number.

12423244142 is a deficient number, since it is larger than the sum of its proper divisors (6211622074).

12423244142 is an equidigital number, since it uses as much as digits as its factorization.

12423244142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6211622073.

The product of its digits is 12288, while the sum is 29.

Adding to 12423244142 its reverse (24144232421), we get a palindrome (36567476563).

The spelling of 12423244142 in words is "twelve billion, four hundred twenty-three million, two hundred forty-four thousand, one hundred forty-two".