13331230021 has 2 divisors, whose sum is σ = 13331230022. Its totient is φ = 13331230020.

The previous prime is 13331230019. The next prime is 13331230027. The reversal of 13331230021 is 12003213331.

13331230021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12185068996 + 1146161025 = 110386^2 + 33855^2 .

It is an emirp because it is prime and its reverse (12003213331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13331230021 - 2¹ = 13331230019 is a prime.

Together with 13331230019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13331230027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6665615010 + 6665615011.

It is an arithmetic number, because the mean of its divisors is an integer number (6665615011).

Almost surely, 2^13331230021 is an apocalyptic number.

It is an amenable number.

13331230021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13331230021 is an equidigital number, since it uses as much as digits as its factorization.

13331230021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 13331230021 its reverse (12003213331), we get a palindrome (25334443352).

The spelling of 13331230021 in words is "thirteen billion, three hundred thirty-one million, two hundred thirty thousand, twenty-one".