21321133320103 has 2 divisors, whose sum is σ = 21321133320104. Its totient is φ = 21321133320102.

The previous prime is 21321133320101. The next prime is 21321133320131. The reversal of 21321133320103 is 30102333112312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21321133320103 - 2¹ = 21321133320101 is a prime.

Together with 21321133320101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21321133320101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660566660051 + 10660566660052.

It is an arithmetic number, because the mean of its divisors is an integer number (10660566660052).

Almost surely, 2^{21321133320103} is an apocalyptic number.

21321133320103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321133320103 is an equidigital number, since it uses as much as digits as its factorization.

21321133320103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21321133320103 its reverse (30102333112312), we get a palindrome (51423466432415).

The spelling of 21321133320103 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred thirty-three million, three hundred twenty thousand, one hundred three".