12131121324412 has 12 divisors (see below), whose sum is σ = 21961512742680. Its totient is φ = 5856403397936.

The previous prime is 12131121324407. The next prime is 12131121324449. The reversal of 12131121324412 is 21442312113121.

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 3 ways as a sum of consecutive naturals, for example, 52289315938 + ... + 52289316169.

It is an arithmetic number, because the mean of its divisors is an integer number (1830126061890).

Almost surely, 2^{12131121324412} is an apocalyptic number.

It is an amenable number.

12131121324412 is a deficient number, since it is larger than the sum of its proper divisors (9830391418268).

12131121324412 is a wasteful number, since it uses less digits than its factorization.

12131121324412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104578632140 (or 104578632138 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

Adding to 12131121324412 its reverse (21442312113121), we get a palindrome (33573433437533).

The spelling of 12131121324412 in words is "twelve trillion, one hundred thirty-one billion, one hundred twenty-one million, three hundred twenty-four thousand, four hundred twelve".