201133221 has 16 divisors (see below), whose sum is σ = 289924800. Its totient is φ = 123596928.

The previous prime is 201133217. The next prime is 201133243. The reversal of 201133221 is 122331102.

It is not a de Polignac number, because 201133221 - 2² = 201133217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201133221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201133271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45576 + ... + 49793.

It is an arithmetic number, because the mean of its divisors is an integer number (18120300).

Almost surely, 2^201133221 is an apocalyptic number.

It is an amenable number.

201133221 is a deficient number, since it is larger than the sum of its proper divisors (88791579).

201133221 is a wasteful number, since it uses less digits than its factorization.

201133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95428.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 201133221 is about 14182.1444429254. The cubic root of 201133221 is about 585.9059875120.

Adding to 201133221 its reverse (122331102), we get a palindrome (323464323).

The spelling of 201133221 in words is "two hundred one million, one hundred thirty-three thousand, two hundred twenty-one".