12216969 has 12 divisors (see below), whose sum is σ = 17681716. Its totient is φ = 8128512.

The previous prime is 12216959. The next prime is 12216983. The reversal of 12216969 is 96961221.

12216969 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 2 ways, for example, as 7354944 + 4862025 = 2712^2 + 2205^2 .

It is not a de Polignac number, because 12216969 - 2⁵ = 12216937 is a prime.

It is a super-2 number, since 2×12216969² = 298508663093922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12216949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5049 + ... + 7065.

Almost surely, 2^12216969 is an apocalyptic number.

It is an amenable number.

12216969 is a deficient number, since it is larger than the sum of its proper divisors (5464747).

12216969 is a wasteful number, since it uses less digits than its factorization.

12216969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696 (or 2693 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 12216969 is about 3495.2781005236. The cubic root of 12216969 is about 230.3144344630.

The spelling of 12216969 in words is "twelve million, two hundred sixteen thousand, nine hundred sixty-nine".