2200211221 has 4 divisors (see below), whose sum is σ = 2369458252. Its totient is φ = 2030964192.

The previous prime is 2200211201. The next prime is 2200211231. The reversal of 2200211221 is 1221120022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119574225 + 2080636996 = 10935^2 + 45614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2200211221 - 2¹⁷ = 2200080149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 169247017 = 2200211221 / (2 + 2 + 0 + 0 + 2 + 1 + 1 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200211201) 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 3 ways as a sum of consecutive naturals, for example, 84623496 + ... + 84623521.

It is an arithmetic number, because the mean of its divisors is an integer number (592364563).

Almost surely, 2^2200211221 is an apocalyptic number.

It is an amenable number.

2200211221 is a deficient number, since it is larger than the sum of its proper divisors (169247031).

2200211221 is a wasteful number, since it uses less digits than its factorization.

2200211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169247030.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2200211221 is about 46906.4091676180. The cubic root of 2200211221 is about 1300.6330685839.

Adding to 2200211221 its reverse (1221120022), we get a palindrome (3421331243).

The spelling of 2200211221 in words is "two billion, two hundred million, two hundred eleven thousand, two hundred twenty-one".