22441572221 has 2 divisors, whose sum is σ = 22441572222. Its totient is φ = 22441572220.

The previous prime is 22441572199. The next prime is 22441572253. The reversal of 22441572221 is 12227514422.

It is an a-pointer prime, because the next prime (22441572253) can be obtained adding 22441572221 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21810859225 + 630712996 = 147685^2 + 25114^2 .

It is a cyclic number.

It is not a de Polignac number, because 22441572221 - 2²² = 22437377917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22441572521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11220786110 + 11220786111.

It is an arithmetic number, because the mean of its divisors is an integer number (11220786111).

Almost surely, 2^22441572221 is an apocalyptic number.

It is an amenable number.

22441572221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22441572221 is an equidigital number, since it uses as much as digits as its factorization.

22441572221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 32.

The spelling of 22441572221 in words is "twenty-two billion, four hundred forty-one million, five hundred seventy-two thousand, two hundred twenty-one".