11133320221 has 4 divisors (see below), whose sum is σ = 11191006012. Its totient is φ = 11075634432.

The previous prime is 11133320203. The next prime is 11133320257. The reversal of 11133320221 is 12202333111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2008294596 + 9125025625 = 44814^2 + 95525^2 .

It is a cyclic number.

It is not a de Polignac number, because 11133320221 - 2¹⁵ = 11133287453 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 (11133320201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28842606 + ... + 28842991.

It is an arithmetic number, because the mean of its divisors is an integer number (2797751503).

Almost surely, 2^11133320221 is an apocalyptic number.

It is an amenable number.

11133320221 is a deficient number, since it is larger than the sum of its proper divisors (57685791).

11133320221 is an equidigital number, since it uses as much as digits as its factorization.

11133320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57685790.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11133320221 its reverse (12202333111), we get a palindrome (23335653332).

The spelling of 11133320221 in words is "eleven billion, one hundred thirty-three million, three hundred twenty thousand, two hundred twenty-one".