22070221 has 2 divisors, whose sum is σ = 22070222. Its totient is φ = 22070220.

The previous prime is 22070203. The next prime is 22070261. The reversal of 22070221 is 12207022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20124196 + 1946025 = 4486^2 + 1395^2 .

It is a cyclic number.

It is not a de Polignac number, because 22070221 - 2⁹ = 22069709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22070195 and 22070204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22070201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11035110 + 11035111.

It is an arithmetic number, because the mean of its divisors is an integer number (11035111).

Almost surely, 2^22070221 is an apocalyptic number.

It is an amenable number.

22070221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22070221 is an equidigital number, since it uses as much as digits as its factorization.

22070221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 22070221 is about 4697.8953798483. The cubic root of 22070221 is about 280.5017406844.

Adding to 22070221 its reverse (12207022), we get a palindrome (34277243).

The spelling of 22070221 in words is "twenty-two million, seventy thousand, two hundred twenty-one".