12423254221 has 4 divisors (see below), whose sum is σ = 14198004832. Its totient is φ = 10648503612.

The previous prime is 12423254209. The next prime is 12423254231. The reversal of 12423254221 is 12245232421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12423254221 - 2¹⁵ = 12423221453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12423254221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423254231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887375295 + ... + 887375308.

It is an arithmetic number, because the mean of its divisors is an integer number (3549501208).

Almost surely, 2^12423254221 is an apocalyptic number.

It is an amenable number.

12423254221 is a deficient number, since it is larger than the sum of its proper divisors (1774750611).

12423254221 is an equidigital number, since it uses as much as digits as its factorization.

12423254221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774750610.

The product of its digits is 7680, while the sum is 28.

Adding to 12423254221 its reverse (12245232421), we get a palindrome (24668486642).

The spelling of 12423254221 in words is "twelve billion, four hundred twenty-three million, two hundred fifty-four thousand, two hundred twenty-one".