21200202203 has 4 divisors (see below), whose sum is σ = 21216473808. Its totient is φ = 21183930600.

The previous prime is 21200202197. The next prime is 21200202263. The reversal of 21200202203 is 30220200212.

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 21200202203 - 2⁶ = 21200202139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200202263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8133848 + ... + 8136453.

It is an arithmetic number, because the mean of its divisors is an integer number (5304118452).

Almost surely, 2^21200202203 is an apocalyptic number.

21200202203 is a deficient number, since it is larger than the sum of its proper divisors (16271605).

21200202203 is a wasteful number, since it uses less digits than its factorization.

21200202203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16271604.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 21200202203 its reverse (30220200212), we get a palindrome (51420402415).

The spelling of 21200202203 in words is "twenty-one billion, two hundred million, two hundred two thousand, two hundred three".