12051216 has 30 divisors (see below), whose sum is σ = 33727070. Its totient is φ = 4017024.

The previous prime is 12051209. The next prime is 12051227. The reversal of 12051216 is 61215021.

12051216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11532816 + 518400 = 3396^2 + 720^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41701 + ... + 41988.

Almost surely, 2^12051216 is an apocalyptic number.

12051216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12051216 is an abundant number, since it is smaller than the sum of its proper divisors (21675854).

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

12051216 is a wasteful number, since it uses less digits than its factorization.

12051216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83703 (or 83694 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 12051216 is about 3471.4861370888. The cubic root of 12051216 is about 229.2680955896.

Adding to 12051216 its reverse (61215021), we get a palindrome (73266237).

The spelling of 12051216 in words is "twelve million, fifty-one thousand, two hundred sixteen".