12422444221 has 16 divisors (see below), whose sum is σ = 14355334080. Its totient is φ = 10624078080.

The previous prime is 12422444189. The next prime is 12422444227. The reversal of 12422444221 is 12244422421.

It is a happy number.

It is not a de Polignac number, because 12422444221 - 2⁵ = 12422444189 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 12422444221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12422444227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442090 + ... + 469348.

It is an arithmetic number, because the mean of its divisors is an integer number (897208380).

Almost surely, 2^12422444221 is an apocalyptic number.

12422444221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12422444221 is a deficient number, since it is larger than the sum of its proper divisors (1932889859).

12422444221 is a wasteful number, since it uses less digits than its factorization.

12422444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29724.

The product of its digits is 8192, while the sum is 28.

Adding to 12422444221 its reverse (12244422421), we get a palindrome (24666866642).

The spelling of 12422444221 in words is "twelve billion, four hundred twenty-two million, four hundred forty-four thousand, two hundred twenty-one".