12117226 has 32 divisors (see below), whose sum is σ = 21228480. Its totient is φ = 5126400.

The previous prime is 12117221. The next prime is 12117233. The reversal of 12117226 is 62271121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 12117197 and 12117206.

It is not an unprimeable number, because it can be changed into a prime (12117221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66856 + ... + 67036.

It is an arithmetic number, because the mean of its divisors is an integer number (663390).

Almost surely, 2^12117226 is an apocalyptic number.

12117226 is a deficient number, since it is larger than the sum of its proper divisors (9111254).

12117226 is a wasteful number, since it uses less digits than its factorization.

12117226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390.

The product of its digits is 336, while the sum is 22.

The square root of 12117226 is about 3480.9806089664. The cubic root of 12117226 is about 229.6859355501.

Adding to 12117226 its reverse (62271121), we get a palindrome (74388347).

The spelling of 12117226 in words is "twelve million, one hundred seventeen thousand, two hundred twenty-six".