11331403221 has 4 divisors (see below), whose sum is σ = 15108537632. Its totient is φ = 7554268812.

The previous prime is 11331403177. The next prime is 11331403241. The reversal of 11331403221 is 12230413311.

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 not a de Polignac number, because 11331403221 - 2⁷ = 11331403093 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 (11331403241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1888567201 + ... + 1888567206.

It is an arithmetic number, because the mean of its divisors is an integer number (3777134408).

Almost surely, 2^11331403221 is an apocalyptic number.

It is an amenable number.

11331403221 is a deficient number, since it is larger than the sum of its proper divisors (3777134411).

11331403221 is an equidigital number, since it uses as much as digits as its factorization.

11331403221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777134410.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 11331403221 its reverse (12230413311), we get a palindrome (23561816532).

The spelling of 11331403221 in words is "eleven billion, three hundred thirty-one million, four hundred three thousand, two hundred twenty-one".