12123542012 has 6 divisors (see below), whose sum is σ = 21216198528. Its totient is φ = 6061771004.

The previous prime is 12123542009. The next prime is 12123542033. The reversal of 12123542012 is 21024532121.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1515442748 + ... + 1515442755.

It is an arithmetic number, because the mean of its divisors is an integer number (3536033088).

Almost surely, 2^12123542012 is an apocalyptic number.

It is an amenable number.

12123542012 is a deficient number, since it is larger than the sum of its proper divisors (9092656516).

12123542012 is a wasteful number, since it uses less digits than its factorization.

12123542012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030885507 (or 3030885505 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The spelling of 12123542012 in words is "twelve billion, one hundred twenty-three million, five hundred forty-two thousand, twelve".