12012312540 has 48 divisors (see below), whose sum is σ = 35612976672. Its totient is φ = 3014854656.

The previous prime is 12012312539. The next prime is 12012312581. The reversal of 12012312540 is 4521321021.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5887369 + ... + 5889408.

It is an arithmetic number, because the mean of its divisors is an integer number (741937014).

Almost surely, 2^12012312540 is an apocalyptic number.

12012312540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012312540 is an abundant number, since it is smaller than the sum of its proper divisors (23600664132).

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

12012312540 is a wasteful number, since it uses less digits than its factorization.

12012312540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11776806 (or 11776804 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12012312540 its reverse (4521321021), we get a palindrome (16533633561).

The spelling of 12012312540 in words is "twelve billion, twelve million, three hundred twelve thousand, five hundred forty".