201112201221 has 4 divisors (see below), whose sum is σ = 268149601632. Its totient is φ = 134074800812.

The previous prime is 201112201207. The next prime is 201112201223. The reversal of 201112201221 is 122102211102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201112201221 - 2⁷ = 201112201093 is a prime.

It is a super-2 number, since 2×201112201221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201112201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201112201223) 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 3 ways as a sum of consecutive naturals, for example, 33518700201 + ... + 33518700206.

It is an arithmetic number, because the mean of its divisors is an integer number (67037400408).

Almost surely, 2^201112201221 is an apocalyptic number.

It is an amenable number.

201112201221 is a deficient number, since it is larger than the sum of its proper divisors (67037400411).

201112201221 is an equidigital number, since it uses as much as digits as its factorization.

201112201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67037400410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201112201221 its reverse (122102211102), we get a palindrome (323214412323).

The spelling of 201112201221 in words is "two hundred one billion, one hundred twelve million, two hundred one thousand, two hundred twenty-one".