21020113330321 has 8 divisors (see below), whose sum is σ = 24851365513920. Its totient is φ = 17395955859408.

The previous prime is 21020113330319. The next prime is 21020113330409. The reversal of 21020113330321 is 12303331102012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21020113330321 - 2¹ = 21020113330319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21020113330292 and 21020113330301.

It is not an unprimeable number, because it can be changed into a prime (21020113330421) 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 in 7 ways as a sum of consecutive naturals, for example, 51773677951 + ... + 51773678356.

It is an arithmetic number, because the mean of its divisors is an integer number (3106420689240).

Almost surely, 2^{21020113330321} is an apocalyptic number.

It is an amenable number.

21020113330321 is a deficient number, since it is larger than the sum of its proper divisors (3831252183599).

21020113330321 is a wasteful number, since it uses less digits than its factorization.

21020113330321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103547356343.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21020113330321 its reverse (12303331102012), we get a palindrome (33323444432333).

The spelling of 21020113330321 in words is "twenty-one trillion, twenty billion, one hundred thirteen million, three hundred thirty thousand, three hundred twenty-one".