21200022003 has 4 divisors (see below), whose sum is σ = 28266696008. Its totient is φ = 14133348000.

The previous prime is 21200021993. The next prime is 21200022007. The reversal of 21200022003 is 30022000212.

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

It is not a de Polignac number, because 21200022003 - 2⁵ = 21200021971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21200022003.

It is not an unprimeable number, because it can be changed into a prime (21200022007) 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 in 3 ways as a sum of consecutive naturals, for example, 3533336998 + ... + 3533337003.

It is an arithmetic number, because the mean of its divisors is an integer number (7066674002).

Almost surely, 2^21200022003 is an apocalyptic number.

21200022003 is a deficient number, since it is larger than the sum of its proper divisors (7066674005).

21200022003 is an equidigital number, since it uses as much as digits as its factorization.

21200022003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7066674004.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21200022003 its reverse (30022000212), we get a palindrome (51222022215).

The spelling of 21200022003 in words is "twenty-one billion, two hundred million, twenty-two thousand, three".