220221011009 has 2 divisors, whose sum is σ = 220221011010. Its totient is φ = 220221011008.

The previous prime is 220221010969. The next prime is 220221011053. The reversal of 220221011009 is 900110122022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176796702784 + 43424308225 = 420472^2 + 208385^2 .

It is a cyclic number.

It is not a de Polignac number, because 220221011009 - 2¹² = 220221006913 is a prime.

It is not a weakly prime, because it can be changed into another prime (220221011209) 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, 110110505504 + 110110505505.

It is an arithmetic number, because the mean of its divisors is an integer number (110110505505).

Almost surely, 2^220221011009 is an apocalyptic number.

It is an amenable number.

220221011009 is a deficient number, since it is larger than the sum of its proper divisors (1).

220221011009 is an equidigital number, since it uses as much as digits as its factorization.

220221011009 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 20.

The spelling of 220221011009 in words is "two hundred twenty billion, two hundred twenty-one million, eleven thousand, nine".