21210322203 has 64 divisors (see below), whose sum is σ = 36389606400. Its totient is φ = 11959453440.

The previous prime is 21210322169. The next prime is 21210322213. The reversal of 21210322203 is 30222301212.

It is not a de Polignac number, because 21210322203 - 2¹⁸ = 21210060059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21210322213) 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 in 63 ways as a sum of consecutive naturals, for example, 10983148 + ... + 10985078.

It is an arithmetic number, because the mean of its divisors is an integer number (568587600).

Almost surely, 2^21210322203 is an apocalyptic number.

21210322203 is a deficient number, since it is larger than the sum of its proper divisors (15179284197).

21210322203 is a wasteful number, since it uses less digits than its factorization.

21210322203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689 (or 2683 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21210322203 its reverse (30222301212), we get a palindrome (51432623415).

The spelling of 21210322203 in words is "twenty-one billion, two hundred ten million, three hundred twenty-two thousand, two hundred three".