20221089221 has 2 divisors, whose sum is σ = 20221089222. Its totient is φ = 20221089220.

The previous prime is 20221089209. The next prime is 20221089233. The reversal of 20221089221 is 12298012202.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (20221089209) and next prime (20221089233).

It can be written as a sum of positive squares in only one way, i.e., 20205201025 + 15888196 = 142145^2 + 3986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20221089221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221089271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110544610 + 10110544611.

It is an arithmetic number, because the mean of its divisors is an integer number (10110544611).

Almost surely, 2^20221089221 is an apocalyptic number.

It is an amenable number.

20221089221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221089221 is an equidigital number, since it uses as much as digits as its factorization.

20221089221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 20221089221 in words is "twenty billion, two hundred twenty-one million, eighty-nine thousand, two hundred twenty-one".