21201232203 has 6 divisors (see below), whose sum is σ = 30624002084. Its totient is φ = 14134154796.

The previous prime is 21201232193. The next prime is 21201232211. The reversal of 21201232203 is 30223210212.

It is not a de Polignac number, because 21201232203 - 2⁶ = 21201232139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201232223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1177846225 + ... + 1177846242.

Almost surely, 2^21201232203 is an apocalyptic number.

21201232203 is a deficient number, since it is larger than the sum of its proper divisors (9422769881).

21201232203 is a wasteful number, since it uses less digits than its factorization.

21201232203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355692473 (or 2355692470 counting only the distinct ones).

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

Adding to 21201232203 its reverse (30223210212), we get a palindrome (51424442415).

The spelling of 21201232203 in words is "twenty-one billion, two hundred one million, two hundred thirty-two thousand, two hundred three".