12021435032013 has 20 divisors (see below), whose sum is σ = 19590486720288. Its totient is φ = 7285718200680.

The previous prime is 12021435031999. The next prime is 12021435032017. The reversal of 12021435032013 is 31023053412021.

12021435032013 is a `hidden beast` number, since 1 + 2 + 0 + 2 + 143 + 503 + 2 + 0 + 13 = 666.

It is not a de Polignac number, because 12021435032013 - 2⁴ = 12021435031997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021435032017) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6746034481 + ... + 6746036262.

Almost surely, 2^{12021435032013} is an apocalyptic number.

It is an amenable number.

12021435032013 is a deficient number, since it is larger than the sum of its proper divisors (7569051688275).

12021435032013 is a wasteful number, since it uses less digits than its factorization.

12021435032013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13492070766 (or 13492070757 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 12021435032013 its reverse (31023053412021), we get a palindrome (43044488444034).

The spelling of 12021435032013 in words is "twelve trillion, twenty-one billion, four hundred thirty-five million, thirty-two thousand, thirteen".