21321113203003 has 2 divisors, whose sum is σ = 21321113203004. Its totient is φ = 21321113203002.

The previous prime is 21321113203001. The next prime is 21321113203031. The reversal of 21321113203003 is 30030231112312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21321113203003 - 2¹ = 21321113203001 is a prime.

Together with 21321113203001, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21321113203001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660556601501 + 10660556601502.

It is an arithmetic number, because the mean of its divisors is an integer number (10660556601502).

Almost surely, 2^{21321113203003} is an apocalyptic number.

21321113203003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321113203003 is an equidigital number, since it uses as much as digits as its factorization.

21321113203003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21321113203003 its reverse (30030231112312), we get a palindrome (51351344315315).

The spelling of 21321113203003 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred thirteen million, two hundred three thousand, three".