12003111312 has 40 divisors (see below), whose sum is σ = 31282459104. Its totient is φ = 3965627904.

The previous prime is 12003111311. The next prime is 12003111413. The reversal of 12003111312 is 21311130021.

It is a happy number.

It is a super-3 number, since 3×12003111312³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 12003111291 and 12003111300.

It is not an unprimeable number, because it can be changed into a prime (12003111311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1101058 + ... + 1111905.

Almost surely, 2^12003111312 is an apocalyptic number.

12003111312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12003111312 is an abundant number, since it is smaller than the sum of its proper divisors (19279347792).

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

12003111312 is a wasteful number, since it uses less digits than its factorization.

12003111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213087 (or 2213081 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 12003111312 its reverse (21311130021), we get a palindrome (33314241333).

The spelling of 12003111312 in words is "twelve billion, three million, one hundred eleven thousand, three hundred twelve".