11232013221 has 24 divisors (see below), whose sum is σ = 19060388256. Its totient is φ = 6283643040.

The previous prime is 11232013213. The next prime is 11232013241. The reversal of 11232013221 is 12231023211.

11232013221 is a `hidden beast` number, since 112 + 320 + 13 + 221 = 666.

It is not a de Polignac number, because 11232013221 - 2³ = 11232013213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11232013194 and 11232013203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11232013241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4362355 + ... + 4364928.

It is an arithmetic number, because the mean of its divisors is an integer number (794182844).

Almost surely, 2^11232013221 is an apocalyptic number.

11232013221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11232013221 is a deficient number, since it is larger than the sum of its proper divisors (7828375035).

11232013221 is a wasteful number, since it uses less digits than its factorization.

11232013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8727313 (or 8727310 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11232013221 its reverse (12231023211), we get a palindrome (23463036432).

The spelling of 11232013221 in words is "eleven billion, two hundred thirty-two million, thirteen thousand, two hundred twenty-one".