12012211 has 4 divisors (see below), whose sum is σ = 12020800. Its totient is φ = 12003624.

The previous prime is 12012197. The next prime is 12012257. The reversal of 12012211 is 11221021.

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 12012211 - 2⁷ = 12012083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012271) 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, 1656 + ... + 5173.

It is an arithmetic number, because the mean of its divisors is an integer number (3005200).

Almost surely, 2^12012211 is an apocalyptic number.

12012211 is a deficient number, since it is larger than the sum of its proper divisors (8589).

12012211 is an equidigital number, since it uses as much as digits as its factorization.

12012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8588.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 12012211 is about 3465.8636730258. The cubic root of 12012211 is about 229.0204783273.

Adding to 12012211 its reverse (11221021), we get a palindrome (23233232).

The spelling of 12012211 in words is "twelve million, twelve thousand, two hundred eleven".