200001221 has 8 divisors (see below), whose sum is σ = 228784320. Its totient is φ = 171271008.

The previous prime is 200001211. The next prime is 200001223. The reversal of 200001221 is 122100002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 200001221 - 2²² = 195806917 is a prime.

It is a Duffinian number.

200001221 is a modest number, since divided by 1221 gives 200 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200001199 and 200001208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200001223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4751 + ... + 20556.

It is an arithmetic number, because the mean of its divisors is an integer number (28598040).

Almost surely, 2^200001221 is an apocalyptic number.

It is an amenable number.

200001221 is a deficient number, since it is larger than the sum of its proper divisors (28783099).

200001221 is a wasteful number, since it uses less digits than its factorization.

200001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26443.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 200001221 is about 14142.1787925341. The cubic root of 200001221 is about 584.8047377154.

Adding to 200001221 its reverse (122100002), we get a palindrome (322101223).

The spelling of 200001221 in words is "two hundred million, one thousand, two hundred twenty-one".