22424222221 has 4 divisors (see below), whose sum is σ = 22425219072. Its totient is φ = 22423225372.

The previous prime is 22424222167. The next prime is 22424222243. The reversal of 22424222221 is 12222242422.

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 22424222221 - 2¹⁵ = 22424189453 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 (22424222251) 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 3 ways as a sum of consecutive naturals, for example, 463885 + ... + 509938.

It is an arithmetic number, because the mean of its divisors is an integer number (5606304768).

Almost surely, 2^22424222221 is an apocalyptic number.

It is an amenable number.

22424222221 is a deficient number, since it is larger than the sum of its proper divisors (996851).

22424222221 is an equidigital number, since it uses as much as digits as its factorization.

22424222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996850.

The product of its digits is 4096, while the sum is 25.

Adding to 22424222221 its reverse (12222242422), we get a palindrome (34646464643).

The spelling of 22424222221 in words is "twenty-two billion, four hundred twenty-four million, two hundred twenty-two thousand, two hundred twenty-one".