13044120243021 has 48 divisors (see below), whose sum is σ = 21867889994496. Its totient is φ = 7338748393728.

The previous prime is 13044120243019. The next prime is 13044120243047. The reversal of 13044120243021 is 12034202144031.

13044120243021 is a `hidden beast` number, since 1 + 3 + 0 + 4 + 4 + 1 + 202 + 430 + 21 = 666.

It is not a de Polignac number, because 13044120243021 - 2¹ = 13044120243019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13044120243071) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 4687200 + ... + 6932393.

It is an arithmetic number, because the mean of its divisors is an integer number (455581041552).

Almost surely, 2^{13044120243021} is an apocalyptic number.

It is an amenable number.

13044120243021 is a deficient number, since it is larger than the sum of its proper divisors (8823769751475).

13044120243021 is a wasteful number, since it uses less digits than its factorization.

13044120243021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11619882 (or 11619879 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 13044120243021 its reverse (12034202144031), we get a palindrome (25078322387052).

The spelling of 13044120243021 in words is "thirteen trillion, forty-four billion, one hundred twenty million, two hundred forty-three thousand, twenty-one".