12003311312 has 20 divisors (see below), whose sum is σ = 24624440676. Its totient is φ = 5648616960.

The previous prime is 12003311291. The next prime is 12003311317. The reversal of 12003311312 is 21311330021.

It can be written as a sum of positive squares in 2 ways, for example, as 5965399696 + 6037911616 = 77236^2 + 77704^2 .

It is a super-2 number, since 2×12003311312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003311317) 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, 22064639 + ... + 22065182.

Almost surely, 2^12003311312 is an apocalyptic number.

It is an amenable number.

12003311312 is an abundant number, since it is smaller than the sum of its proper divisors (12621129364).

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

12003311312 is a wasteful number, since it uses less digits than its factorization.

12003311312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44129846 (or 44129840 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12003311312 its reverse (21311330021), we get a palindrome (33314641333).

The spelling of 12003311312 in words is "twelve billion, three million, three hundred eleven thousand, three hundred twelve".