11201222221 has 8 divisors (see below), whose sum is σ = 12805854080. Its totient is φ = 9597704688.

The previous prime is 11201222183. The next prime is 11201222243. The reversal of 11201222221 is 12222210211.

It is a happy number.

11201222221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11201222221 - 2⁹ = 11201221709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201222195 and 11201222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201222261) 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 7 ways as a sum of consecutive naturals, for example, 256926 + ... + 297343.

It is an arithmetic number, because the mean of its divisors is an integer number (1600731760).

Almost surely, 2^11201222221 is an apocalyptic number.

It is an amenable number.

11201222221 is a deficient number, since it is larger than the sum of its proper divisors (1604631859).

11201222221 is an equidigital number, since it uses as much as digits as its factorization.

11201222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557163.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11201222221 its reverse (12222210211), we get a palindrome (23423432432).

The spelling of 11201222221 in words is "eleven billion, two hundred one million, two hundred twenty-two thousand, two hundred twenty-one".