21300203003 has 2 divisors, whose sum is σ = 21300203004. Its totient is φ = 21300203002.

The previous prime is 21300202943. The next prime is 21300203021. The reversal of 21300203003 is 30030200312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21300203003 - 2¹⁸ = 21299940859 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21300203503) 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, 10650101501 + 10650101502.

It is an arithmetic number, because the mean of its divisors is an integer number (10650101502).

Almost surely, 2^21300203003 is an apocalyptic number.

21300203003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300203003 is an equidigital number, since it uses as much as digits as its factorization.

21300203003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 14.

Adding to 21300203003 its reverse (30030200312), we get a palindrome (51330403315).

The spelling of 21300203003 in words is "twenty-one billion, three hundred million, two hundred three thousand, three".