221202020009 has 2 divisors, whose sum is σ = 221202020010. Its totient is φ = 221202020008.

The previous prime is 221202019943. The next prime is 221202020033. The reversal of 221202020009 is 900020202122.

221202020009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116125555984 + 105076464025 = 340772^2 + 324155^2 .

It is a cyclic number.

It is not a de Polignac number, because 221202020009 - 2²⁴ = 221185242793 is a prime.

It is a super-3 number, since 3×221202020009³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (221202040009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110601010004 + 110601010005.

It is an arithmetic number, because the mean of its divisors is an integer number (110601010005).

Almost surely, 2^221202020009 is an apocalyptic number.

It is an amenable number.

221202020009 is a deficient number, since it is larger than the sum of its proper divisors (1).

221202020009 is an equidigital number, since it uses as much as digits as its factorization.

221202020009 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 221202020009 in words is "two hundred twenty-one billion, two hundred two million, twenty thousand, nine".