11332112211221 has 2 divisors, whose sum is σ = 11332112211222. Its totient is φ = 11332112211220.

The previous prime is 11332112211181. The next prime is 11332112211223. The reversal of 11332112211221 is 12211221123311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11286844968100 + 45267243121 = 3359590^2 + 212761^2 .

It is a cyclic number.

It is not a de Polignac number, because 11332112211221 - 2⁶ = 11332112211157 is a prime.

Together with 11332112211223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11332112211223) 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 as a sum of consecutive naturals, namely, 5666056105610 + 5666056105611.

It is an arithmetic number, because the mean of its divisors is an integer number (5666056105611).

Almost surely, 2^{11332112211221} is an apocalyptic number.

It is an amenable number.

11332112211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11332112211221 is an equidigital number, since it uses as much as digits as its factorization.

11332112211221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

Adding to 11332112211221 its reverse (12211221123311), we get a palindrome (23543333334532).

The spelling of 11332112211221 in words is "eleven trillion, three hundred thirty-two billion, one hundred twelve million, two hundred eleven thousand, two hundred twenty-one".