22241225821 has 2 divisors, whose sum is σ = 22241225822. Its totient is φ = 22241225820.

The previous prime is 22241225813. The next prime is 22241225893. The reversal of 22241225821 is 12852214222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20510249796 + 1730976025 = 143214^2 + 41605^2 .

It is a cyclic number.

It is not a de Polignac number, because 22241225821 - 2³ = 22241225813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22241225021) 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, 11120612910 + 11120612911.

It is an arithmetic number, because the mean of its divisors is an integer number (11120612911).

Almost surely, 2^22241225821 is an apocalyptic number.

It is an amenable number.

22241225821 is a deficient number, since it is larger than the sum of its proper divisors (1).

22241225821 is an equidigital number, since it uses as much as digits as its factorization.

22241225821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10240, while the sum is 31.

The spelling of 22241225821 in words is "twenty-two billion, two hundred forty-one million, two hundred twenty-five thousand, eight hundred twenty-one".