21233303332321 has 4 divisors (see below), whose sum is σ = 21233316384000. Its totient is φ = 21233290280644.

The previous prime is 21233303332279. The next prime is 21233303332357. The reversal of 21233303332321 is 12323330333212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21233303332321 - 2⁷ = 21233303332193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233303392321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3668521 + ... + 7478278.

It is an arithmetic number, because the mean of its divisors is an integer number (5308329096000).

Almost surely, 2^{21233303332321} is an apocalyptic number.

It is an amenable number.

21233303332321 is a deficient number, since it is larger than the sum of its proper divisors (13051679).

21233303332321 is a wasteful number, since it uses less digits than its factorization.

21233303332321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13051678.

The product of its (nonzero) digits is 34992, while the sum is 31.

Adding to 21233303332321 its reverse (12323330333212), we get a palindrome (33556633665533).

The spelling of 21233303332321 in words is "twenty-one trillion, two hundred thirty-three billion, three hundred three million, three hundred thirty-two thousand, three hundred twenty-one".