21133331203 has 4 divisors (see below), whose sum is σ = 21342572208. Its totient is φ = 20924090200.

The previous prime is 21133331189. The next prime is 21133331207. The reversal of 21133331203 is 30213333112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21133331203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21133331207) 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, 104620351 + ... + 104620552.

It is an arithmetic number, because the mean of its divisors is an integer number (5335643052).

Almost surely, 2^21133331203 is an apocalyptic number.

21133331203 is a deficient number, since it is larger than the sum of its proper divisors (209241005).

21133331203 is a wasteful number, since it uses less digits than its factorization.

21133331203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209241004.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21133331203 its reverse (30213333112), we get a palindrome (51346664315).

The spelling of 21133331203 in words is "twenty-one billion, one hundred thirty-three million, three hundred thirty-one thousand, two hundred three".