201221110221 has 8 divisors (see below), whose sum is σ = 269777106144. Its totient is φ = 133406260560.

The previous prime is 201221110187. The next prime is 201221110247. The reversal of 201221110221 is 122011122102.

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

It is not a de Polignac number, because 201221110221 - 2¹⁸ = 201220848077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201221110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221110021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185285931 + ... + 185287016.

It is an arithmetic number, because the mean of its divisors is an integer number (33722138268).

Almost surely, 2^201221110221 is an apocalyptic number.

It is an amenable number.

201221110221 is a deficient number, since it is larger than the sum of its proper divisors (68555995923).

201221110221 is a wasteful number, since it uses less digits than its factorization.

201221110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370573131.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201221110221 its reverse (122011122102), we get a palindrome (323232232323).

The spelling of 201221110221 in words is "two hundred one billion, two hundred twenty-one million, one hundred ten thousand, two hundred twenty-one".