201221303 has 4 divisors (see below), whose sum is σ = 203067480. Its totient is φ = 199375128.

The previous prime is 201221291. The next prime is 201221309. The reversal of 201221303 is 303122102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201221303 - 2²⁰ = 200172727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221309) 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, 922925 + ... + 923142.

It is an arithmetic number, because the mean of its divisors is an integer number (50766870).

Almost surely, 2^201221303 is an apocalyptic number.

201221303 is a deficient number, since it is larger than the sum of its proper divisors (1846177).

201221303 is a wasteful number, since it uses less digits than its factorization.

201221303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846176.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 201221303 is about 14185.2494867027. The cubic root of 201221303 is about 585.9915033694.

Adding to 201221303 its reverse (303122102), we get a palindrome (504343405).

The spelling of 201221303 in words is "two hundred one million, two hundred twenty-one thousand, three hundred three".