12117211 has 8 divisors (see below), whose sum is σ = 12432384. Its totient is φ = 11804520.

The previous prime is 12117121. The next prime is 12117221. The reversal of 12117211 is 11271121.

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

It is not a de Polignac number, because 12117211 - 2¹¹ = 12115163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12117221) 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, 12846 + ... + 13756.

It is an arithmetic number, because the mean of its divisors is an integer number (1554048).

Almost surely, 2^12117211 is an apocalyptic number.

12117211 is a deficient number, since it is larger than the sum of its proper divisors (315173).

12117211 is an equidigital number, since it uses as much as digits as its factorization.

12117211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241.

The product of its digits is 28, while the sum is 16.

The square root of 12117211 is about 3480.9784544004. The cubic root of 12117211 is about 229.6858407735.

Adding to 12117211 its reverse (11271121), we get a palindrome (23388332).

The spelling of 12117211 in words is "twelve million, one hundred seventeen thousand, two hundred eleven".