201021201 has 12 divisors (see below), whose sum is σ = 295286160. Its totient is φ = 131742360.

The previous prime is 201021199. The next prime is 201021211. The reversal of 201021201 is 102120102.

It is not a de Polignac number, because 201021201 - 2¹ = 201021199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (201021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188755 + ... + 189816.

It is an arithmetic number, because the mean of its divisors is an integer number (24607180).

Almost surely, 2^201021201 is an apocalyptic number.

It is an amenable number.

201021201 is a deficient number, since it is larger than the sum of its proper divisors (94264959).

201021201 is a wasteful number, since it uses less digits than its factorization.

201021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378636 (or 378633 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 201021201 is about 14178.1945606625. The cubic root of 201021201 is about 585.7971949800.

Adding to 201021201 its reverse (102120102), we get a palindrome (303141303).

The spelling of 201021201 in words is "two hundred one million, twenty-one thousand, two hundred one".