21321113233333 has 2 divisors, whose sum is σ = 21321113233334. Its totient is φ = 21321113233332.

The previous prime is 21321113233309. The next prime is 21321113233337. The reversal of 21321113233333 is 33333231112312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11470698732964 + 9850414500369 = 3386842^2 + 3138537^2 .

It is a cyclic number.

It is not a de Polignac number, because 21321113233333 - 2³³ = 21312523298741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21321113233295 and 21321113233304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21321113233337) 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 as a sum of consecutive naturals, namely, 10660556616666 + 10660556616667.

It is an arithmetic number, because the mean of its divisors is an integer number (10660556616667).

Almost surely, 2^{21321113233333} is an apocalyptic number.

It is an amenable number.

21321113233333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321113233333 is an equidigital number, since it uses as much as digits as its factorization.

21321113233333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 31.

Adding to 21321113233333 its reverse (33333231112312), we get a palindrome (54654344345645).

The spelling of 21321113233333 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred thirteen million, two hundred thirty-three thousand, three hundred thirty-three".