201221133 has 16 divisors (see below), whose sum is σ = 278878656. Its totient is φ = 128943360.

The previous prime is 201221113. The next prime is 201221143. The reversal of 201221133 is 331122102.

It is not a de Polignac number, because 201221133 - 2⁵ = 201221101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221113) 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, 1708 + ... + 20133.

It is an arithmetic number, because the mean of its divisors is an integer number (17429916).

Almost surely, 2^201221133 is an apocalyptic number.

It is an amenable number.

201221133 is a deficient number, since it is larger than the sum of its proper divisors (77657523).

201221133 is a wasteful number, since it uses less digits than its factorization.

201221133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21964.

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

The square root of 201221133 is about 14185.2434945615. The cubic root of 201221133 is about 585.9913383461.

Adding to 201221133 its reverse (331122102), we get a palindrome (532343235).

The spelling of 201221133 in words is "two hundred one million, two hundred twenty-one thousand, one hundred thirty-three".