201221444 has 12 divisors (see below), whose sum is σ = 352371600. Its totient is φ = 100543848.

The previous prime is 201221441. The next prime is 201221477. The reversal of 201221444 is 444122102.

It is not an unprimeable number, because it can be changed into a prime (201221441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9614 + ... + 22245.

It is an arithmetic number, because the mean of its divisors is an integer number (29364300).

Almost surely, 2^201221444 is an apocalyptic number.

It is an amenable number.

201221444 is a deficient number, since it is larger than the sum of its proper divisors (151150156).

201221444 is a wasteful number, since it uses less digits than its factorization.

201221444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33442 (or 33440 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 201221444 is about 14185.2544566532. The cubic root of 201221444 is about 585.9916402415.

Adding to 201221444 its reverse (444122102), we get a palindrome (645343546).

The spelling of 201221444 in words is "two hundred one million, two hundred twenty-one thousand, four hundred forty-four".