22000442221 has 2 divisors, whose sum is σ = 22000442222. Its totient is φ = 22000442220.

The previous prime is 22000442201. The next prime is 22000442341. The reversal of 22000442221 is 12224400022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12806317225 + 9194124996 = 113165^2 + 95886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22000442221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22000442201) 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 as a sum of consecutive naturals, namely, 11000221110 + 11000221111.

It is an arithmetic number, because the mean of its divisors is an integer number (11000221111).

Almost surely, 2^22000442221 is an apocalyptic number.

It is an amenable number.

22000442221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000442221 is an equidigital number, since it uses as much as digits as its factorization.

22000442221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 22000442221 its reverse (12224400022), we get a palindrome (34224842243).

The spelling of 22000442221 in words is "twenty-two billion, four hundred forty-two thousand, two hundred twenty-one".