12216126 has 32 divisors (see below), whose sum is σ = 27699840. Its totient is φ = 3560544.

The previous prime is 12216121. The next prime is 12216131. The reversal of 12216126 is 62161221.

It is an interprime number because it is at equal distance from previous prime (12216121) and next prime (12216131).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12216121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2640 + ... + 5603.

It is an arithmetic number, because the mean of its divisors is an integer number (865620).

Almost surely, 2^12216126 is an apocalyptic number.

12216126 is an abundant number, since it is smaller than the sum of its proper divisors (15483714).

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

12216126 is a wasteful number, since it uses less digits than its factorization.

12216126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8280.

The product of its digits is 288, while the sum is 21.

The square root of 12216126 is about 3495.1575071805. The cubic root of 12216126 is about 230.3091369261.

Adding to 12216126 its reverse (62161221), we get a palindrome (74377347).

The spelling of 12216126 in words is "twelve million, two hundred sixteen thousand, one hundred twenty-six".