12012912 has 30 divisors (see below), whose sum is σ = 33619872. Its totient is φ = 4004256.

The previous prime is 12012907. The next prime is 12012919. The reversal of 12012912 is 21921021.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41568 + ... + 41855.

Almost surely, 2^12012912 is an apocalyptic number.

12012912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12012912 is an abundant number, since it is smaller than the sum of its proper divisors (21606960).

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

12012912 is a wasteful number, since it uses less digits than its factorization.

12012912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83437 (or 83428 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 12012912 is about 3465.9648007445. The cubic root of 12012912 is about 229.0249332450.

Adding to 12012912 its reverse (21921021), we get a palindrome (33933933).

The spelling of 12012912 in words is "twelve million, twelve thousand, nine hundred twelve".