12013320030021 has 6 divisors (see below), whose sum is σ = 17352573376710. Its totient is φ = 8008880020008.

The previous prime is 12013320029999. The next prime is 12013320030053. The reversal of 12013320030021 is 12003002331021.

12013320030021 is a `hidden beast` number, since 1 + 20 + 1 + 3 + 320 + 0 + 300 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11766539597121 + 246780432900 = 3430239^2 + 496770^2 .

It is not a de Polignac number, because 12013320030021 - 2⁶ = 12013320029957 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12013320029976 and 12013320030003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013320030721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667406668326 + ... + 667406668343.

It is an arithmetic number, because the mean of its divisors is an integer number (2892095562785).

Almost surely, 2^{12013320030021} is an apocalyptic number.

It is an amenable number.

12013320030021 is a deficient number, since it is larger than the sum of its proper divisors (5339253346689).

12013320030021 is a wasteful number, since it uses less digits than its factorization.

12013320030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334813336675 (or 1334813336672 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12013320030021 its reverse (12003002331021), we get a palindrome (24016322361042).

The spelling of 12013320030021 in words is "twelve trillion, thirteen billion, three hundred twenty million, thirty thousand, twenty-one".