221002022009 has 2 divisors, whose sum is σ = 221002022010. Its totient is φ = 221002022008.

The previous prime is 221002021993. The next prime is 221002022023. The reversal of 221002022009 is 900220200122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130878979984 + 90123042025 = 361772^2 + 300205^2 .

It is a cyclic number.

It is not a de Polignac number, because 221002022009 - 2⁴ = 221002021993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (221002022209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501011004 + 110501011005.

It is an arithmetic number, because the mean of its divisors is an integer number (110501011005).

Almost surely, 2^221002022009 is an apocalyptic number.

It is an amenable number.

221002022009 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002022009 is an equidigital number, since it uses as much as digits as its factorization.

221002022009 is an evil number, because the sum of its binary digits is even.

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

The spelling of 221002022009 in words is "two hundred twenty-one billion, two million, twenty-two thousand, nine".