200101221 has 12 divisors (see below), whose sum is σ = 289381248. Its totient is φ = 133241064.

The previous prime is 200101207. The next prime is 200101229. The reversal of 200101221 is 122101002.

It is not a de Polignac number, because 200101221 - 2⁶ = 200101157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200101229) 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 11 ways as a sum of consecutive naturals, for example, 5115 + ... + 20648.

It is an arithmetic number, because the mean of its divisors is an integer number (24115104).

Almost surely, 2^200101221 is an apocalyptic number.

It is an amenable number.

200101221 is a deficient number, since it is larger than the sum of its proper divisors (89280027).

200101221 is a wasteful number, since it uses less digits than its factorization.

200101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26632 (or 26629 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 200101221 is about 14145.7138738206. The cubic root of 200101221 is about 584.9021883368.

Adding to 200101221 its reverse (122101002), we get a palindrome (322202223).

The spelling of 200101221 in words is "two hundred million, one hundred one thousand, two hundred twenty-one".