11222201221 has 16 divisors (see below), whose sum is σ = 14442651648. Its totient is φ = 8462487600.

The previous prime is 11222201219. The next prime is 11222201227. The reversal of 11222201221 is 12210222211.

It is a happy number.

11222201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11222201221 - 2¹ = 11222201219 is a prime.

It is a super-2 number, since 2×11222201221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222201195 and 11222201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222201227) 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 15 ways as a sum of consecutive naturals, for example, 2348305 + ... + 2353078.

It is an arithmetic number, because the mean of its divisors is an integer number (902665728).

Almost surely, 2^11222201221 is an apocalyptic number.

11222201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11222201221 is a deficient number, since it is larger than the sum of its proper divisors (3220450427).

11222201221 is a wasteful number, since it uses less digits than its factorization.

11222201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4701432.

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

Adding to 11222201221 its reverse (12210222211), we get a palindrome (23432423432).

The spelling of 11222201221 in words is "eleven billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty-one".