22444020221 has 12 divisors (see below), whose sum is σ = 26111566620. Its totient is φ = 19235361600.

The previous prime is 22444020197. The next prime is 22444020229. The reversal of 22444020221 is 12202044422.

It can be written as a sum of positive squares in 2 ways, for example, as 11580127321 + 10863892900 = 107611^2 + 104230^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22444020221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22444020229) 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 11 ways as a sum of consecutive naturals, for example, 458321 + ... + 504921.

It is an arithmetic number, because the mean of its divisors is an integer number (2175963885).

Almost surely, 2^22444020221 is an apocalyptic number.

It is an amenable number.

22444020221 is a deficient number, since it is larger than the sum of its proper divisors (3667546399).

22444020221 is an equidigital number, since it uses as much as digits as its factorization.

22444020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56444 (or 56437 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 22444020221 its reverse (12202044422), we get a palindrome (34646064643).

The spelling of 22444020221 in words is "twenty-two billion, four hundred forty-four million, twenty thousand, two hundred twenty-one".