21200320333 has 2 divisors, whose sum is σ = 21200320334. Its totient is φ = 21200320332.

The previous prime is 21200320319. The next prime is 21200320367. The reversal of 21200320333 is 33302300212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10991844964 + 10208475369 = 104842^2 + 101037^2 .

It is a cyclic number.

It is not a de Polignac number, because 21200320333 - 2⁹ = 21200319821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21200320333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200320433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600160166 + 10600160167.

It is an arithmetic number, because the mean of its divisors is an integer number (10600160167).

Almost surely, 2^21200320333 is an apocalyptic number.

It is an amenable number.

21200320333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200320333 is an equidigital number, since it uses as much as digits as its factorization.

21200320333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21200320333 its reverse (33302300212), we get a palindrome (54502620545).

The spelling of 21200320333 in words is "twenty-one billion, two hundred million, three hundred twenty thousand, three hundred thirty-three".