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BaseRepresentation
bin10111110110101
3121202100
42332311
5342323
6132313
750415
oct27665
917670
1012213
1191a3
127099
135736
144645
153943
hex2fb5

12213 has 12 divisors (see below), whose sum is σ = 18720. Its totient is φ = 7656.

The previous prime is 12211. The next prime is 12227. The reversal of 12213 is 31221.

It is a happy number.

12213 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12213 - 21 = 12211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12195 and 12204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178 + ... + 236.

It is an arithmetic number, because the mean of its divisors is an integer number (1560).

212213 is an apocalyptic number.

It is an amenable number.

12213 is a deficient number, since it is larger than the sum of its proper divisors (6507).

12213 is a wasteful number, since it uses less digits than its factorization.

12213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 85 counting only the distinct ones).

The product of its digits is 12, while the sum is 9.

The square root of 12213 is about 110.5124427384. The cubic root of 12213 is about 23.0289490551.

Adding to 12213 its reverse (31221), we get a palindrome (43434).

It can be divided in two parts, 1221 and 3, that multiplied together give a palindrome (3663).

The spelling of 12213 in words is "twelve thousand, two hundred thirteen".

Divisors: 1 3 9 23 59 69 177 207 531 1357 4071 12213