22242446221 has 2 divisors, whose sum is σ = 22242446222. Its totient is φ = 22242446220.

The previous prime is 22242446209. The next prime is 22242446251. The reversal of 22242446221 is 12264424222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22242441321 + 4900 = 149139^2 + 70^2 .

It is a cyclic number.

It is not a de Polignac number, because 22242446221 - 2²¹ = 22240349069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22242446201) 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 as a sum of consecutive naturals, namely, 11121223110 + 11121223111.

It is an arithmetic number, because the mean of its divisors is an integer number (11121223111).

Almost surely, 2^22242446221 is an apocalyptic number.

It is an amenable number.

22242446221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22242446221 is an equidigital number, since it uses as much as digits as its factorization.

22242446221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24576, while the sum is 31.

The spelling of 22242446221 in words is "twenty-two billion, two hundred forty-two million, four hundred forty-six thousand, two hundred twenty-one".