21033321230213 has 2 divisors, whose sum is σ = 21033321230214. Its totient is φ = 21033321230212.

The previous prime is 21033321230197. The next prime is 21033321230239. The reversal of 21033321230213 is 31203212333012.

It is an a-pointer prime, because the next prime (21033321230239) can be obtained adding 21033321230213 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10776559176289 + 10256762053924 = 3282767^2 + 3202618^2 .

It is a cyclic number.

It is not a de Polignac number, because 21033321230213 - 2⁴ = 21033321230197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21033321230513) 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, 10516660615106 + 10516660615107.

It is an arithmetic number, because the mean of its divisors is an integer number (10516660615107).

Almost surely, 2^{21033321230213} is an apocalyptic number.

It is an amenable number.

21033321230213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033321230213 is an equidigital number, since it uses as much as digits as its factorization.

21033321230213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21033321230213 its reverse (31203212333012), we get a palindrome (52236533563225).

The spelling of 21033321230213 in words is "twenty-one trillion, thirty-three billion, three hundred twenty-one million, two hundred thirty thousand, two hundred thirteen".