21113330426321 has 16 divisors (see below), whose sum is σ = 25549038662400. Its totient is φ = 17032512952320.

The previous prime is 21113330426297. The next prime is 21113330426329. The reversal of 21113330426321 is 12362403331112.

It is a cyclic number.

It is not a de Polignac number, because 21113330426321 - 2²² = 21113326232017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21113330426329) 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 15 ways as a sum of consecutive naturals, for example, 31175105 + ... + 31845153.

It is an arithmetic number, because the mean of its divisors is an integer number (1596814916400).

Almost surely, 2^{21113330426321} is an apocalyptic number.

It is an amenable number.

21113330426321 is a deficient number, since it is larger than the sum of its proper divisors (4435708236079).

21113330426321 is a wasteful number, since it uses less digits than its factorization.

21113330426321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934864.

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 21113330426321 its reverse (12362403331112), we get a palindrome (33475733757433).

The spelling of 21113330426321 in words is "twenty-one trillion, one hundred thirteen billion, three hundred thirty million, four hundred twenty-six thousand, three hundred twenty-one".