12109612 has 12 divisors (see below), whose sum is σ = 22307320. Its totient is φ = 5736096.

The previous prime is 12109589. The next prime is 12109613. The reversal of 12109612 is 21690121.

12109612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12109613) 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, 79593 + ... + 79744.

Almost surely, 2^12109612 is an apocalyptic number.

It is an amenable number.

12109612 is a deficient number, since it is larger than the sum of its proper divisors (10197708).

12109612 is a wasteful number, since it uses less digits than its factorization.

12109612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159360 (or 159358 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 12109612 is about 3479.8867797674. The cubic root of 12109612 is about 229.6378168597.

Adding to 12109612 its reverse (21690121), we get a palindrome (33799733).

It can be divided in two parts, 12109 and 612, that added together give a palindrome (12721).

The spelling of 12109612 in words is "twelve million, one hundred nine thousand, six hundred twelve".