2211001220209 has 4 divisors (see below), whose sum is σ = 2211259432816. Its totient is φ = 2210743007604.

The previous prime is 2211001220203. The next prime is 2211001220221. The reversal of 2211001220209 is 9020221001122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2211001220209 - 2⁵ = 2211001220177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2211001220209.

It is not an unprimeable number, because it can be changed into a prime (2211001220203) 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 in 3 ways as a sum of consecutive naturals, for example, 129093459 + ... + 129110584.

It is an arithmetic number, because the mean of its divisors is an integer number (552814858204).

Almost surely, 2^{2211001220209} is an apocalyptic number.

It is an amenable number.

2211001220209 is a deficient number, since it is larger than the sum of its proper divisors (258212607).

2211001220209 is an equidigital number, since it uses as much as digits as its factorization.

2211001220209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258212606.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 2211001220209 in words is "two trillion, two hundred eleven billion, one million, two hundred twenty thousand, two hundred nine".