11211091 has 2 divisors, whose sum is σ = 11211092. Its totient is φ = 11211090.

The previous prime is 11211077. The next prime is 11211103. The reversal of 11211091 is 19011211.

11211091 is digitally balanced in base 3, 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 11211091 - 2⁹ = 11210579 is a prime.

It is a super-2 number, since 2×11211091² = 251377122820562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11211061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605545 + 5605546.

It is an arithmetic number, because the mean of its divisors is an integer number (5605546).

Almost surely, 2^11211091 is an apocalyptic number.

11211091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211091 is an equidigital number, since it uses as much as digits as its factorization.

11211091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 11211091 is about 3348.2967311754. The cubic root of 11211091 is about 223.8116174982.

The spelling of 11211091 in words is "eleven million, two hundred eleven thousand, ninety-one".