12071211 has 4 divisors (see below), whose sum is σ = 16094952. Its totient is φ = 8047472.

The previous prime is 12071209. The next prime is 12071219. The reversal of 12071211 is 11217021.

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 12071211 - 2¹ = 12071209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12071219) 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, 2011866 + ... + 2011871.

It is an arithmetic number, because the mean of its divisors is an integer number (4023738).

Almost surely, 2^12071211 is an apocalyptic number.

12071211 is a deficient number, since it is larger than the sum of its proper divisors (4023741).

12071211 is an equidigital number, since it uses as much as digits as its factorization.

12071211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023740.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 12071211 is about 3474.3648340380. The cubic root of 12071211 is about 229.3948236746.

Adding to 12071211 its reverse (11217021), we get a palindrome (23288232).

The spelling of 12071211 in words is "twelve million, seventy-one thousand, two hundred eleven".