11331321122221 has 4 divisors (see below), whose sum is σ = 11331328022944. Its totient is φ = 11331314221500.

The previous prime is 11331321122207. The next prime is 11331321122239. The reversal of 11331321122221 is 12222112313311.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11331321122221 - 2⁵ = 11331321122189 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 (11331321122021) 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, 589066 + ... + 4796836.

It is an arithmetic number, because the mean of its divisors is an integer number (2832832005736).

Almost surely, 2^{11331321122221} is an apocalyptic number.

It is an amenable number.

11331321122221 is a deficient number, since it is larger than the sum of its proper divisors (6900723).

11331321122221 is an equidigital number, since it uses as much as digits as its factorization.

11331321122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6900722.

The product of its digits is 864, while the sum is 25.

Adding to 11331321122221 its reverse (12222112313311), we get a palindrome (23553433435532).

The spelling of 11331321122221 in words is "eleven trillion, three hundred thirty-one billion, three hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty-one".