21220036063333 has 2 divisors, whose sum is σ = 21220036063334. Its totient is φ = 21220036063332.

The previous prime is 21220036063319. The next prime is 21220036063337. The reversal of 21220036063333 is 33336063002212.

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., 21195775508769 + 24260554564 = 4603887^2 + 155758^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220036063333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220036063337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610018031666 + 10610018031667.

It is an arithmetic number, because the mean of its divisors is an integer number (10610018031667).

Almost surely, 2^{21220036063333} is an apocalyptic number.

It is an amenable number.

21220036063333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220036063333 is an equidigital number, since it uses as much as digits as its factorization.

21220036063333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 34.

Adding to 21220036063333 its reverse (33336063002212), we get a palindrome (54556099065545).

The spelling of 21220036063333 in words is "twenty-one trillion, two hundred twenty billion, thirty-six million, sixty-three thousand, three hundred thirty-three".