22422422221 has 8 divisors (see below), whose sum is σ = 23878624824. Its totient is φ = 20981468160.

The previous prime is 22422422219. The next prime is 22422422251. The reversal of 22422422221 is 12222422422.

It can be written as a sum of positive squares in 4 ways, for example, as 13227530121 + 9194892100 = 115011^2 + 95890^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22422422221 - 2¹ = 22422422219 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 (22422422201) 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 7 ways as a sum of consecutive naturals, for example, 3809100 + ... + 3814981.

It is an arithmetic number, because the mean of its divisors is an integer number (2984828103).

Almost surely, 2^22422422221 is an apocalyptic number.

It is an amenable number.

22422422221 is a deficient number, since it is larger than the sum of its proper divisors (1456202603).

22422422221 is a wasteful number, since it uses less digits than its factorization.

22422422221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7624271.

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

Adding to 22422422221 its reverse (12222422422), we get a palindrome (34644844643).

The spelling of 22422422221 in words is "twenty-two billion, four hundred twenty-two million, four hundred twenty-two thousand, two hundred twenty-one".