21042010333 has 2 divisors, whose sum is σ = 21042010334. Its totient is φ = 21042010332.

The previous prime is 21042010331. The next prime is 21042010349. The reversal of 21042010333 is 33301024012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19583763364 + 1458246969 = 139942^2 + 38187^2 .

It is a cyclic number.

It is not a de Polignac number, because 21042010333 - 2¹ = 21042010331 is a prime.

Together with 21042010331, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21042010333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21042010331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10521005166 + 10521005167.

It is an arithmetic number, because the mean of its divisors is an integer number (10521005167).

Almost surely, 2^21042010333 is an apocalyptic number.

It is an amenable number.

21042010333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21042010333 is an equidigital number, since it uses as much as digits as its factorization.

21042010333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21042010333 its reverse (33301024012), we get a palindrome (54343034345).

The spelling of 21042010333 in words is "twenty-one billion, forty-two million, ten thousand, three hundred thirty-three".