11611211 has 4 divisors (see below), whose sum is σ = 11627424. Its totient is φ = 11595000.

The previous prime is 11611199. The next prime is 11611217. The reversal of 11611211 is 11211611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11611211 - 2¹⁰ = 11610187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11611217) 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 in 3 ways as a sum of consecutive naturals, for example, 6980 + ... + 8481.

It is an arithmetic number, because the mean of its divisors is an integer number (2906856).

Almost surely, 2^11611211 is an apocalyptic number.

11611211 is a deficient number, since it is larger than the sum of its proper divisors (16213).

11611211 is an equidigital number, since it uses as much as digits as its factorization.

11611211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16212.

The product of its digits is 12, while the sum is 14.

The square root of 11611211 is about 3407.5227071877. The cubic root of 11611211 is about 226.4431420550.

Adding to 11611211 its reverse (11211611), we get a palindrome (22822822).

The spelling of 11611211 in words is "eleven million, six hundred eleven thousand, two hundred eleven".