12000209912 has 16 divisors (see below), whose sum is σ = 22504842360. Its totient is φ = 5998918624.

The previous prime is 12000209909. The next prime is 12000209989. The reversal of 12000209912 is 21990200021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104543 + ... + 186894.

Almost surely, 2^12000209912 is an apocalyptic number.

It is an amenable number.

12000209912 is a deficient number, since it is larger than the sum of its proper divisors (10504632448).

12000209912 is a wasteful number, since it uses less digits than its factorization.

12000209912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296590 (or 296586 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

Adding to 12000209912 its reverse (21990200021), we get a palindrome (33990409933).

The spelling of 12000209912 in words is "twelve billion, two hundred nine thousand, nine hundred twelve".