21133230203 has 4 divisors (see below), whose sum is σ = 21342470208. Its totient is φ = 20923990200.

The previous prime is 21133230191. The next prime is 21133230221. The reversal of 21133230203 is 30203233112.

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 21133230203 - 2⁸ = 21133229947 is a prime.

It is a super-2 number, since 2×21133230203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21133232203) 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, 104619851 + ... + 104620052.

It is an arithmetic number, because the mean of its divisors is an integer number (5335617552).

Almost surely, 2^21133230203 is an apocalyptic number.

21133230203 is a deficient number, since it is larger than the sum of its proper divisors (209240005).

21133230203 is a wasteful number, since it uses less digits than its factorization.

21133230203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209240004.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21133230203 its reverse (30203233112), we get a palindrome (51336463315).

The spelling of 21133230203 in words is "twenty-one billion, one hundred thirty-three million, two hundred thirty thousand, two hundred three".