12442421323 has 4 divisors (see below), whose sum is σ = 12653309880. Its totient is φ = 12231532768.

The previous prime is 12442421317. The next prime is 12442421333. The reversal of 12442421323 is 32312424421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12442421323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12442421291 and 12442421300.

It is not an unprimeable number, because it can be changed into a prime (12442421333) 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, 105444190 + ... + 105444307.

It is an arithmetic number, because the mean of its divisors is an integer number (3163327470).

Almost surely, 2^12442421323 is an apocalyptic number.

12442421323 is a deficient number, since it is larger than the sum of its proper divisors (210888557).

12442421323 is an equidigital number, since it uses as much as digits as its factorization.

12442421323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210888556.

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

Adding to 12442421323 its reverse (32312424421), we get a palindrome (44754845744).

The spelling of 12442421323 in words is "twelve billion, four hundred forty-two million, four hundred twenty-one thousand, three hundred twenty-three".