12212616 has 48 divisors (see below), whose sum is σ = 33071760. Its totient is φ = 3756480.

The previous prime is 12212597. The next prime is 12212623. The reversal of 12212616 is 61621221.

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 = 12212592 and 12212601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2551 + ... + 5561.

It is an arithmetic number, because the mean of its divisors is an integer number (688995).

Almost surely, 2^12212616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12212616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16535880).

12212616 is an abundant number, since it is smaller than the sum of its proper divisors (20859144).

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

12212616 is a wasteful number, since it uses less digits than its factorization.

12212616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046 (or 3029 counting only the distinct ones).

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

The square root of 12212616 is about 3494.6553478133. The cubic root of 12212616 is about 230.2870769455.

Adding to 12212616 its reverse (61621221), we get a palindrome (73833837).

The spelling of 12212616 in words is "twelve million, two hundred twelve thousand, six hundred sixteen".