12321120012 has 12 divisors (see below), whose sum is σ = 28749280056. Its totient is φ = 4107040000.

The previous prime is 12321120001. The next prime is 12321120017. The reversal of 12321120012 is 21002112321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 12321119973 and 12321120000.

It is not an unprimeable number, because it can be changed into a prime (12321120017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513379989 + ... + 513380012.

It is an arithmetic number, because the mean of its divisors is an integer number (2395773338).

Almost surely, 2^12321120012 is an apocalyptic number.

12321120012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12321120012 is an abundant number, since it is smaller than the sum of its proper divisors (16428160044).

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

12321120012 is a wasteful number, since it uses less digits than its factorization.

12321120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026760008 (or 1026760006 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12321120012 its reverse (21002112321), we get a palindrome (33323232333).

The spelling of 12321120012 in words is "twelve billion, three hundred twenty-one million, one hundred twenty thousand, twelve".