11221213391 has 2 divisors, whose sum is σ = 11221213392. Its totient is φ = 11221213390.

The previous prime is 11221213301. The next prime is 11221213403. The reversal of 11221213391 is 19331212211.

11221213391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11221213391 - 2³⁰ = 10147471567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11221213391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221213301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610606695 + 5610606696.

It is an arithmetic number, because the mean of its divisors is an integer number (5610606696).

Almost surely, 2^11221213391 is an apocalyptic number.

11221213391 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221213391 is an equidigital number, since it uses as much as digits as its factorization.

11221213391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 26.

The spelling of 11221213391 in words is "eleven billion, two hundred twenty-one million, two hundred thirteen thousand, three hundred ninety-one".