11331321232221 has 12 divisors (see below), whose sum is σ = 16391150644960. Its totient is φ = 7543281858120.

The previous prime is 11331321232207. The next prime is 11331321232223. The reversal of 11331321232221 is 12223212313311.

11331321232221 is a `hidden beast` number, since 1 + 1 + 3 + 313 + 2 + 1 + 2 + 322 + 21 = 666.

It is not a de Polignac number, because 11331321232221 - 2⁶ = 11331321232157 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 (11331321232223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 911018161 + ... + 911030598.

Almost surely, 2^{11331321232221} is an apocalyptic number.

It is an amenable number.

11331321232221 is a deficient number, since it is larger than the sum of its proper divisors (5059829412739).

11331321232221 is a wasteful number, since it uses less digits than its factorization.

11331321232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822049456 (or 1822049453 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 11331321232221 its reverse (12223212313311), we get a palindrome (23554533545532).

The spelling of 11331321232221 in words is "eleven trillion, three hundred thirty-one billion, three hundred twenty-one million, two hundred thirty-two thousand, two hundred twenty-one".