21103320133327 has 2 divisors, whose sum is σ = 21103320133328. Its totient is φ = 21103320133326.

The previous prime is 21103320133307. The next prime is 21103320133349. The reversal of 21103320133327 is 72333102330112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21103320133327 - 2¹⁹ = 21103319609039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21103320133307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551660066663 + 10551660066664.

It is an arithmetic number, because the mean of its divisors is an integer number (10551660066664).

Almost surely, 2^{21103320133327} is an apocalyptic number.

21103320133327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103320133327 is an equidigital number, since it uses as much as digits as its factorization.

21103320133327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 31.

Adding to 21103320133327 its reverse (72333102330112), we get a palindrome (93436422463439).

The spelling of 21103320133327 in words is "twenty-one trillion, one hundred three billion, three hundred twenty million, one hundred thirty-three thousand, three hundred twenty-seven".