220221202009 has 2 divisors, whose sum is σ = 220221202010. Its totient is φ = 220221202008.

The previous prime is 220221201953. The next prime is 220221202013. The reversal of 220221202009 is 900202122022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127106510400 + 93114691609 = 356520^2 + 305147^2 .

It is a cyclic number.

It is not a de Polignac number, because 220221202009 - 2³³ = 211631267417 is a prime.

It is not a weakly prime, because it can be changed into another prime (220221202099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110110601004 + 110110601005.

It is an arithmetic number, because the mean of its divisors is an integer number (110110601005).

Almost surely, 2^220221202009 is an apocalyptic number.

It is an amenable number.

220221202009 is a deficient number, since it is larger than the sum of its proper divisors (1).

220221202009 is an equidigital number, since it uses as much as digits as its factorization.

220221202009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 220221202009 in words is "two hundred twenty billion, two hundred twenty-one million, two hundred two thousand, nine".