21023222203 has 4 divisors (see below), whose sum is σ = 21058203208. Its totient is φ = 20988241200.

The previous prime is 21023222183. The next prime is 21023222237. The reversal of 21023222203 is 30222232012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21023222203 - 2¹³ = 21023214011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21023222273) 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 3 ways as a sum of consecutive naturals, for example, 17489601 + ... + 17490802.

It is an arithmetic number, because the mean of its divisors is an integer number (5264550802).

Almost surely, 2^21023222203 is an apocalyptic number.

21023222203 is a deficient number, since it is larger than the sum of its proper divisors (34981005).

21023222203 is an equidigital number, since it uses as much as digits as its factorization.

21023222203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34981004.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21023222203 its reverse (30222232012), we get a palindrome (51245454215).

The spelling of 21023222203 in words is "twenty-one billion, twenty-three million, two hundred twenty-two thousand, two hundred three".