12422243021 has 6 divisors (see below), whose sum is σ = 12692171790. Its totient is φ = 12157937816.

The previous prime is 12422243011. The next prime is 12422243023. The reversal of 12422243021 is 12034222421.

12422243021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7196977225 + 5225265796 = 84835^2 + 72286^2 .

It is not a de Polignac number, because 12422243021 - 2¹⁴ = 12422226637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12422243023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2809526 + ... + 2813943.

It is an arithmetic number, because the mean of its divisors is an integer number (2115361965).

Almost surely, 2^12422243021 is an apocalyptic number.

It is an amenable number.

12422243021 is a deficient number, since it is larger than the sum of its proper divisors (269928769).

12422243021 is an frugal number, since it uses more digits than its factorization.

12422243021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5623563 (or 5623516 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12422243021 its reverse (12034222421), we get a palindrome (24456465442).

The spelling of 12422243021 in words is "twelve billion, four hundred twenty-two million, two hundred forty-three thousand, twenty-one".