202221109 has 2 divisors, whose sum is σ = 202221110. Its totient is φ = 202221108.

The previous prime is 202221079. The next prime is 202221121. The reversal of 202221109 is 901122202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177688900 + 24532209 = 13330^2 + 4953^2 .

It is a cyclic number.

It is not a de Polignac number, because 202221109 - 2⁵ = 202221077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202221139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110554 + 101110555.

It is an arithmetic number, because the mean of its divisors is an integer number (101110555).

Almost surely, 2^202221109 is an apocalyptic number.

It is an amenable number.

202221109 is a deficient number, since it is larger than the sum of its proper divisors (1).

202221109 is an equidigital number, since it uses as much as digits as its factorization.

202221109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 202221109 is about 14220.4468635834. The cubic root of 202221109 is about 586.9604368004.

The spelling of 202221109 in words is "two hundred two million, two hundred twenty-one thousand, one hundred nine".