12211 has 2 divisors, whose sum is σ = 12212.
Its totient is φ = 12210.
The previous prime is 12203. The next prime is 12227. The reversal of 12211 is 11221.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 12211 - 23 = 12203 is a prime.
It is the 111-st Hogben number.
It is a junction number, because it is equal to n+sod(n) for n = 12194 and 12203.
It is not a weakly prime, because it can be changed into another prime (12241) by changing a digit.
It is a nontrivial repunit in base 110.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105 + 6106.
It is an arithmetic number, because the mean of its divisors is an integer number (6106).
212211 is an apocalyptic number.
12211 is a deficient number, since it is larger than the sum of its proper divisors (1).
12211 is an equidigital number, since it uses as much as digits as its factorization.
12211 is an evil number, because the sum of its binary digits is even.
The product of its digits is 4, while the sum is 7.
The square root of 12211 is about 110.5033936130.
The cubic root of 12211 is about 23.0276919135.
Adding to 12211 its reverse (11221), we get a palindrome (23432).
Subtracting from 12211 its reverse (11221), we obtain a triangular number (990 = T44).
The spelling of 12211 in words is "twelve thousand, two hundred eleven", and thus it is an iban number.