11100011221 has 16 divisors (see below), whose sum is σ = 12290761728. Its totient is φ = 9959241600.

The previous prime is 11100011191. The next prime is 11100011231. The reversal of 11100011221 is 12211000111.

It is a cyclic number.

It is not a de Polignac number, because 11100011221 - 2¹⁷ = 11099880149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11100011198 and 11100011207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100011231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106020 + ... + 182866.

It is an arithmetic number, because the mean of its divisors is an integer number (768172608).

Almost surely, 2^11100011221 is an apocalyptic number.

It is an amenable number.

11100011221 is a deficient number, since it is larger than the sum of its proper divisors (1190750507).

11100011221 is a wasteful number, since it uses less digits than its factorization.

11100011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77172.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11100011221 its reverse (12211000111), we get a palindrome (23311011332).

It can be divided in two parts, 111000 and 11221, that added together give a palindrome (122221).

The spelling of 11100011221 in words is "eleven billion, one hundred million, eleven thousand, two hundred twenty-one".