2200001221 has 32 divisors (see below), whose sum is σ = 2567946240. Its totient is φ = 1864948800.

The previous prime is 2200001207. The next prime is 2200001227. The reversal of 2200001221 is 1221000022.

It is not a de Polignac number, because 2200001221 - 2⁵ = 2200001189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2200001198 and 2200001207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200001227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2560690 + ... + 2561548.

It is an arithmetic number, because the mean of its divisors is an integer number (80248320).

Almost surely, 2^2200001221 is an apocalyptic number.

It is an amenable number.

2200001221 is a deficient number, since it is larger than the sum of its proper divisors (367945019).

2200001221 is a wasteful number, since it uses less digits than its factorization.

2200001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2200001221 is about 46904.1706141362. The cubic root of 2200001221 is about 1300.5916874608.

Adding to 2200001221 its reverse (1221000022), we get a palindrome (3421001243).

The spelling of 2200001221 in words is "two billion, two hundred million, one thousand, two hundred twenty-one".