12213126 has 16 divisors (see below), whose sum is σ = 27140400. Its totient is φ = 4071024.

The previous prime is 12213109. The next prime is 12213127. The reversal of 12213126 is 62131221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12213099 and 12213108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213127) 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 7 ways as a sum of consecutive naturals, for example, 113031 + ... + 113138.

It is an arithmetic number, because the mean of its divisors is an integer number (1696275).

Almost surely, 2^12213126 is an apocalyptic number.

12213126 is an abundant number, since it is smaller than the sum of its proper divisors (14927274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12213126 is a wasteful number, since it uses less digits than its factorization.

12213126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226180 (or 226174 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 12213126 is about 3494.7283156205. The cubic root of 12213126 is about 230.2902825043.

Adding to 12213126 its reverse (62131221), we get a palindrome (74344347).

The spelling of 12213126 in words is "twelve million, two hundred thirteen thousand, one hundred twenty-six".