21020113333223 has 2 divisors, whose sum is σ = 21020113333224. Its totient is φ = 21020113333222.

The previous prime is 21020113333213. The next prime is 21020113333229. The reversal of 21020113333223 is 32233331102012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21020113333223 - 2¹⁰ = 21020113332199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21020113333192 and 21020113333201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020113333229) 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, 10510056666611 + 10510056666612.

It is an arithmetic number, because the mean of its divisors is an integer number (10510056666612).

Almost surely, 2^{21020113333223} is an apocalyptic number.

21020113333223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020113333223 is an equidigital number, since it uses as much as digits as its factorization.

21020113333223 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 21020113333223 its reverse (32233331102012), we get a palindrome (53253444435235).

The spelling of 21020113333223 in words is "twenty-one trillion, twenty billion, one hundred thirteen million, three hundred thirty-three thousand, two hundred twenty-three".