11971211 has 8 divisors (see below), whose sum is σ = 13753824. Its totient is φ = 10206720.

The previous prime is 11971207. The next prime is 11971217. The reversal of 11971211 is 11217911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11971211 - 2² = 11971207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11971217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3080 + ... + 5781.

It is an arithmetic number, because the mean of its divisors is an integer number (1719228).

Almost surely, 2^11971211 is an apocalyptic number.

11971211 is a deficient number, since it is larger than the sum of its proper divisors (1782613).

11971211 is an equidigital number, since it uses as much as digits as its factorization.

11971211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9061.

The product of its digits is 126, while the sum is 23.

The square root of 11971211 is about 3459.9437856705. The cubic root of 11971211 is about 228.7596175796.

The spelling of 11971211 in words is "eleven million, nine hundred seventy-one thousand, two hundred eleven".