11221390729 has 2 divisors, whose sum is σ = 11221390730. Its totient is φ = 11221390728.

The previous prime is 11221390727. The next prime is 11221390769. The reversal of 11221390729 is 92709312211.

11221390729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9185305600 + 2036085129 = 95840^2 + 45123^2 .

It is an emirp because it is prime and its reverse (92709312211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11221390729 - 2¹ = 11221390727 is a prime.

Together with 11221390727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11221390721) 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, 5610695364 + 5610695365.

It is an arithmetic number, because the mean of its divisors is an integer number (5610695365).

Almost surely, 2^11221390729 is an apocalyptic number.

It is an amenable number.

11221390729 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221390729 is an equidigital number, since it uses as much as digits as its factorization.

11221390729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 11221390729 in words is "eleven billion, two hundred twenty-one million, three hundred ninety thousand, seven hundred twenty-nine".