201221433 has 12 divisors (see below), whose sum is σ = 332175168. Its totient is φ = 114983640.

The previous prime is 201221431. The next prime is 201221441. The reversal of 201221433 is 334122102.

It is not a de Polignac number, because 201221433 - 2¹ = 201221431 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201221431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1596933 + ... + 1597058.

It is an arithmetic number, because the mean of its divisors is an integer number (27681264).

Almost surely, 2^201221433 is an apocalyptic number.

It is an amenable number.

201221433 is a deficient number, since it is larger than the sum of its proper divisors (130953735).

201221433 is a wasteful number, since it uses less digits than its factorization.

201221433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194004 (or 3194001 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 201221433 is about 14185.2540689266. The cubic root of 201221433 is about 585.9916295636.

Adding to 201221433 its reverse (334122102), we get a palindrome (535343535).

The spelling of 201221433 in words is "two hundred one million, two hundred twenty-one thousand, four hundred thirty-three".