12011216 has 20 divisors (see below), whose sum is σ = 26596512. Its totient is φ = 5147616.

The previous prime is 12011213. The next prime is 12011227. The reversal of 12011216 is 61211021.

12011216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a self number, because there is not a number n which added to its sum of digits gives 12011216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53510 + ... + 53733.

Almost surely, 2^12011216 is an apocalyptic number.

12011216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12011216 is an abundant number, since it is smaller than the sum of its proper divisors (14585296).

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

12011216 is a wasteful number, since it uses less digits than its factorization.

12011216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107258 (or 107252 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 12011216 is about 3465.7201271886. The cubic root of 12011216 is about 229.0141547158.

Adding to 12011216 its reverse (61211021), we get a palindrome (73222237).

The spelling of 12011216 in words is "twelve million, eleven thousand, two hundred sixteen".