12013342440021 has 36 divisors (see below), whose sum is σ = 18916208122500. Its totient is φ = 7343209695744.

The previous prime is 12013342439953. The next prime is 12013342440037. The reversal of 12013342440021 is 12004424331021.

12013342440021 is a `hidden beast` number, since 1 + 201 + 3 + 34 + 2 + 4 + 400 + 21 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 6232082859396 + 5781259580625 = 2496414^2 + 2404425^2 .

It is not a de Polignac number, because 12013342440021 - 2¹³ = 12013342431829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013342540021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26277796 + ... + 26731053.

It is an arithmetic number, because the mean of its divisors is an integer number (525450225625).

Almost surely, 2^{12013342440021} is an apocalyptic number.

It is an amenable number.

12013342440021 is a deficient number, since it is larger than the sum of its proper divisors (6902865682479).

12013342440021 is a wasteful number, since it uses less digits than its factorization.

12013342440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53009030 (or 53009014 counting only the distinct ones).

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

Adding to 12013342440021 its reverse (12004424331021), we get a palindrome (24017766771042).

The spelling of 12013342440021 in words is "twelve trillion, thirteen billion, three hundred forty-two million, four hundred forty thousand, twenty-one".