201111201 has 32 divisors (see below), whose sum is σ = 309456000. Its totient is φ = 128931264.

The previous prime is 201111161. The next prime is 201111217. The reversal of 201111201 is 102111102.

It is a happy number.

It is not a de Polignac number, because 201111201 - 2¹⁰ = 201110177 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 (201111221) 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 31 ways as a sum of consecutive naturals, for example, 327771 + ... + 328383.

It is an arithmetic number, because the mean of its divisors is an integer number (9670500).

Almost surely, 2^201111201 is an apocalyptic number.

It is an amenable number.

201111201 is a deficient number, since it is larger than the sum of its proper divisors (108344799).

201111201 is a wasteful number, since it uses less digits than its factorization.

201111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 201111201 is about 14181.3680933822. The cubic root of 201111201 is about 585.8846051323.

Adding to 201111201 its reverse (102111102), we get a palindrome (303222303).

Subtracting from 201111201 its reverse (102111102), we obtain a palindrome (99000099).

It can be divided in two parts, 20111 and 1201, that added together give a palindrome (21312).

The spelling of 201111201 in words is "two hundred one million, one hundred eleven thousand, two hundred one".