11113421221 has 16 divisors (see below), whose sum is σ = 13308311808. Its totient is φ = 9073785600.

The previous prime is 11113421197. The next prime is 11113421227. The reversal of 11113421221 is 12212431111.

11113421221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11113421221 - 2¹⁵ = 11113388453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11113421227) 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, 104410 + ... + 182011.

It is an arithmetic number, because the mean of its divisors is an integer number (831769488).

Almost surely, 2^11113421221 is an apocalyptic number.

It is an amenable number.

11113421221 is a deficient number, since it is larger than the sum of its proper divisors (2194890587).

11113421221 is a wasteful number, since it uses less digits than its factorization.

11113421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286692.

The product of its digits is 96, while the sum is 19.

Adding to 11113421221 its reverse (12212431111), we get a palindrome (23325852332).

It can be divided in two parts, 111134 and 21221, that added together give a triangular number (132355 = T₅₁₄).

The spelling of 11113421221 in words is "eleven billion, one hundred thirteen million, four hundred twenty-one thousand, two hundred twenty-one".