21321323302133 has 4 divisors (see below), whose sum is σ = 21345634960140. Its totient is φ = 21297011644128.

The previous prime is 21321323302117. The next prime is 21321323302193. The reversal of 21321323302133 is 33120332312312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19195772164804 + 2125551137329 = 4381298^2 + 1457927^2 .

It is a cyclic number.

It is not a de Polignac number, because 21321323302133 - 2⁴ = 21321323302117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21321323302096 and 21321323302105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321323302193) 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 3 ways as a sum of consecutive naturals, for example, 12155827688 + ... + 12155829441.

It is an arithmetic number, because the mean of its divisors is an integer number (5336408740035).

Almost surely, 2^{21321323302133} is an apocalyptic number.

It is an amenable number.

21321323302133 is a deficient number, since it is larger than the sum of its proper divisors (24311658007).

21321323302133 is an equidigital number, since it uses as much as digits as its factorization.

21321323302133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24311658006.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 21321323302133 its reverse (33120332312312), we get a palindrome (54441655614445).

The spelling of 21321323302133 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred twenty-three million, three hundred two thousand, one hundred thirty-three".