11491211 has 4 divisors (see below), whose sum is σ = 11498952. Its totient is φ = 11483472.

The previous prime is 11491199. The next prime is 11491217. The reversal of 11491211 is 11219411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11491211 - 2²² = 7296907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11491217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866 + ... + 4871.

It is an arithmetic number, because the mean of its divisors is an integer number (2874738).

Almost surely, 2^11491211 is an apocalyptic number.

11491211 is a deficient number, since it is larger than the sum of its proper divisors (7741).

11491211 is an equidigital number, since it uses as much as digits as its factorization.

11491211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7740.

The product of its digits is 72, while the sum is 20.

The square root of 11491211 is about 3389.8688765202. The cubic root of 11491211 is about 225.6603546729.

The spelling of 11491211 in words is "eleven million, four hundred ninety-one thousand, two hundred eleven".