11333232221 has 4 divisors (see below), whose sum is σ = 11825981472. Its totient is φ = 10840482972.

The previous prime is 11333232217. The next prime is 11333232227. The reversal of 11333232221 is 12223233311.

11333232221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11333232221 - 2² = 11333232217 is a prime.

It is a super-2 number, since 2×11333232221² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 492749227 = 11333232221 / (1 + 1 + 3 + 3 + 3 + 2 + 3 + 2 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11333232227) 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 3 ways as a sum of consecutive naturals, for example, 246374591 + ... + 246374636.

It is an arithmetic number, because the mean of its divisors is an integer number (2956495368).

Almost surely, 2^11333232221 is an apocalyptic number.

It is an amenable number.

11333232221 is a deficient number, since it is larger than the sum of its proper divisors (492749251).

11333232221 is an equidigital number, since it uses as much as digits as its factorization.

11333232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492749250.

The product of its digits is 1296, while the sum is 23.

Adding to 11333232221 its reverse (12223233311), we get a palindrome (23556465532).

The spelling of 11333232221 in words is "eleven billion, three hundred thirty-three million, two hundred thirty-two thousand, two hundred twenty-one".