12011912 has 24 divisors (see below), whose sum is σ = 24757950. Its totient is φ = 5459520.

The previous prime is 12011903. The next prime is 12011917. The reversal of 12011912 is 21911021.

It can be written as a sum of positive squares in only one way, i.e., 11930116 + 81796 = 3454^2 + 286^2 .

It is not an unprimeable number, because it can be changed into a prime (12011917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5237 + ... + 7172.

Almost surely, 2^12011912 is an apocalyptic number.

It is an amenable number.

12011912 is an abundant number, since it is smaller than the sum of its proper divisors (12746038).

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

12011912 is a wasteful number, since it uses less digits than its factorization.

12011912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12437 (or 12422 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 12011912 is about 3465.8205377659. The cubic root of 12011912 is about 229.0185781029.

Adding to 12011912 its reverse (21911021), we get a palindrome (33922933).

It can be divided in two parts, 1201 and 1912, that added together give a palindrome (3113).

The spelling of 12011912 in words is "twelve million, eleven thousand, nine hundred twelve".