11320111221 has 8 divisors (see below), whose sum is σ = 15127099200. Its totient is φ = 7529932032.

The previous prime is 11320111217. The next prime is 11320111259. The reversal of 11320111221 is 12211102311.

11320111221 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 not a de Polignac number, because 11320111221 - 2² = 11320111217 is a prime.

It is a super-2 number, since 2×11320111221² (a number of 21 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 11320111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11320111291) 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, 4200625 + ... + 4203318.

It is an arithmetic number, because the mean of its divisors is an integer number (1890887400).

Almost surely, 2^11320111221 is an apocalyptic number.

It is an amenable number.

11320111221 is a deficient number, since it is larger than the sum of its proper divisors (3806987979).

11320111221 is an equidigital number, since it uses as much as digits as its factorization.

11320111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8404395.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11320111221 its reverse (12211102311), we get a palindrome (23531213532).

The spelling of 11320111221 in words is "eleven billion, three hundred twenty million, one hundred eleven thousand, two hundred twenty-one".