21020113332233 has 2 divisors, whose sum is σ = 21020113332234. Its totient is φ = 21020113332232.

The previous prime is 21020113332223. The next prime is 21020113332259. The reversal of 21020113332233 is 33223331102012.

It is an a-pointer prime, because the next prime (21020113332259) can be obtained adding 21020113332233 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., 12254179356409 + 8765933975824 = 3500597^2 + 2960732^2 .

It is a cyclic number.

It is not a de Polignac number, because 21020113332233 - 2⁸ = 21020113331977 is a prime.

It is not a weakly prime, because it can be changed into another prime (21020113332223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510056666116 + 10510056666117.

It is an arithmetic number, because the mean of its divisors is an integer number (10510056666117).

Almost surely, 2^{21020113332233} is an apocalyptic number.

It is an amenable number.

21020113332233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020113332233 is an equidigital number, since it uses as much as digits as its factorization.

21020113332233 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 21020113332233 its reverse (33223331102012), we get a palindrome (54243444434245).

The spelling of 21020113332233 in words is "twenty-one trillion, twenty billion, one hundred thirteen million, three hundred thirty-two thousand, two hundred thirty-three".