22221029 has 2 divisors, whose sum is σ = 22221030. Its totient is φ = 22221028.

The previous prime is 22221007. The next prime is 22221037. The reversal of 22221029 is 92012222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22108804 + 112225 = 4702^2 + 335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22221029 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22221029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110514 + 11110515.

It is an arithmetic number, because the mean of its divisors is an integer number (11110515).

Almost surely, 2^22221029 is an apocalyptic number.

It is an amenable number.

22221029 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221029 is an equidigital number, since it uses as much as digits as its factorization.

22221029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 22221029 is about 4713.9186458826. The cubic root of 22221029 is about 281.1391896642.

The spelling of 22221029 in words is "twenty-two million, two hundred twenty-one thousand, twenty-nine".