11443051221 has 32 divisors (see below), whose sum is σ = 17672352768. Its totient is φ = 6450867840.

The previous prime is 11443051211. The next prime is 11443051223. The reversal of 11443051221 is 12215034411.

11443051221 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 11443051221 - 2¹⁰ = 11443050197 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11443051191 and 11443051200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11443051223) 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 31 ways as a sum of consecutive naturals, for example, 1322110 + ... + 1330736.

It is an arithmetic number, because the mean of its divisors is an integer number (552261024).

Almost surely, 2^11443051221 is an apocalyptic number.

It is an amenable number.

11443051221 is a deficient number, since it is larger than the sum of its proper divisors (6229301547).

11443051221 is an equidigital number, since it uses as much as digits as its factorization.

11443051221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9481.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 11443051221 its reverse (12215034411), we get a palindrome (23658085632).

The spelling of 11443051221 in words is "eleven billion, four hundred forty-three million, fifty-one thousand, two hundred twenty-one".