21203327203 has 2 divisors, whose sum is σ = 21203327204. Its totient is φ = 21203327202.

The previous prime is 21203327183. The next prime is 21203327209. The reversal of 21203327203 is 30272330212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21203327203 - 2⁹ = 21203326691 is a prime.

It is not a weakly prime, because it can be changed into another prime (21203327209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601663601 + 10601663602.

It is an arithmetic number, because the mean of its divisors is an integer number (10601663602).

Almost surely, 2^21203327203 is an apocalyptic number.

21203327203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203327203 is an equidigital number, since it uses as much as digits as its factorization.

21203327203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 25.

Adding to 21203327203 its reverse (30272330212), we get a palindrome (51475657415).

The spelling of 21203327203 in words is "twenty-one billion, two hundred three million, three hundred twenty-seven thousand, two hundred three".