21133000203 has 32 divisors (see below), whose sum is σ = 34889918976. Its totient is φ = 11101321728.

The previous prime is 21133000193. The next prime is 21133000223. The reversal of 21133000203 is 30200033112.

It is not a de Polignac number, because 21133000203 - 2⁸ = 21132999947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21133000223) 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 31 ways as a sum of consecutive naturals, for example, 672976 + ... + 703677.

It is an arithmetic number, because the mean of its divisors is an integer number (1090309968).

Almost surely, 2^21133000203 is an apocalyptic number.

21133000203 is a deficient number, since it is larger than the sum of its proper divisors (13756918773).

21133000203 is a wasteful number, since it uses less digits than its factorization.

21133000203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376723.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21133000203 its reverse (30200033112), we get a palindrome (51333033315).

The spelling of 21133000203 in words is "twenty-one billion, one hundred thirty-three million, two hundred three", and thus it is an aban number.