11211002191 has 2 divisors, whose sum is σ = 11211002192. Its totient is φ = 11211002190.

The previous prime is 11211002141. The next prime is 11211002227. The reversal of 11211002191 is 19120011211.

11211002191 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 11211002191 - 2²¹ = 11208905039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211002141) 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, 5605501095 + 5605501096.

It is an arithmetic number, because the mean of its divisors is an integer number (5605501096).

Almost surely, 2^11211002191 is an apocalyptic number.

11211002191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211002191 is an equidigital number, since it uses as much as digits as its factorization.

11211002191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 11211002191 in words is "eleven billion, two hundred eleven million, two thousand, one hundred ninety-one".