21133012203 has 24 divisors (see below), whose sum is σ = 31036461456. Its totient is φ = 13852987200.

The previous prime is 21133012183. The next prime is 21133012207. The reversal of 21133012203 is 30221033112.

21133012203 is a `hidden beast` number, since 211 + 330 + 122 + 0 + 3 = 666.

It is not a de Polignac number, because 21133012203 - 2⁸ = 21133011947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21133012207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2422776 + ... + 2431482.

It is an arithmetic number, because the mean of its divisors is an integer number (1293185894).

Almost surely, 2^21133012203 is an apocalyptic number.

21133012203 is a deficient number, since it is larger than the sum of its proper divisors (9903449253).

21133012203 is a wasteful number, since it uses less digits than its factorization.

21133012203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13195 (or 13192 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21133012203 its reverse (30221033112), we get a palindrome (51354045315).

The spelling of 21133012203 in words is "twenty-one billion, one hundred thirty-three million, twelve thousand, two hundred three".