12212211 has 8 divisors (see below), whose sum is σ = 17763264. Its totient is φ = 7401320.

The previous prime is 12212201. The next prime is 12212237. The reversal of 12212211 is 11221221.

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 12212211 - 2⁶ = 12212147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12212201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185001 + ... + 185066.

It is an arithmetic number, because the mean of its divisors is an integer number (2220408).

Almost surely, 2^12212211 is an apocalyptic number.

12212211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12212211 is a deficient number, since it is larger than the sum of its proper divisors (5551053).

12212211 is a wasteful number, since it uses less digits than its factorization.

12212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370081.

The product of its digits is 16, while the sum is 12.

The square root of 12212211 is about 3494.5974017045. The cubic root of 12212211 is about 230.2845312912.

Adding to 12212211 its reverse (11221221), we get a palindrome (23433432).

The spelling of 12212211 in words is "twelve million, two hundred twelve thousand, two hundred eleven".