21112330203 has 24 divisors (see below), whose sum is σ = 32083711296. Its totient is φ = 13360464000.

The previous prime is 21112330201. The next prime is 21112330229. The reversal of 21112330203 is 30203321112.

21112330203 is a `hidden beast` number, since 21 + 112 + 330 + 203 = 666.

It is not a de Polignac number, because 21112330203 - 2¹ = 21112330201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112330201) 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, 759523 + ... + 786828.

It is an arithmetic number, because the mean of its divisors is an integer number (1336821304).

Almost surely, 2^21112330203 is an apocalyptic number.

21112330203 is a deficient number, since it is larger than the sum of its proper divisors (10971381093).

21112330203 is a wasteful number, since it uses less digits than its factorization.

21112330203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546435 (or 1546432 counting only the distinct ones).

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

Adding to 21112330203 its reverse (30203321112), we get a palindrome (51315651315).

Subtracting 21112330203 from its reverse (30203321112), we obtain a palindrome (9090990909).

The spelling of 21112330203 in words is "twenty-one billion, one hundred twelve million, three hundred thirty thousand, two hundred three".