221211022220209 has 32 divisors (see below), whose sum is σ = 287767714590720. Its totient is φ = 165466435730688.

The previous prime is 221211022220203. The next prime is 221211022220213. The reversal of 221211022220209 is 902022220112122.

It is not a de Polignac number, because 221211022220209 - 2⁹ = 221211022219697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221211022220203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1040720247 + ... + 1040932780.

It is an arithmetic number, because the mean of its divisors is an integer number (8992741080960).

Almost surely, 2^{221211022220209} is an apocalyptic number.

It is an amenable number.

221211022220209 is a deficient number, since it is larger than the sum of its proper divisors (66556692370511).

221211022220209 is a wasteful number, since it uses less digits than its factorization.

221211022220209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081653117.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 221211022220209 in words is "two hundred twenty-one trillion, two hundred eleven billion, twenty-two million, two hundred twenty thousand, two hundred nine".