21331012203 has 32 divisors (see below), whose sum is σ = 31910457600. Its totient is φ = 14082159168.

The previous prime is 21331012189. The next prime is 21331012211. The reversal of 21331012203 is 30221013312.

It is not a de Polignac number, because 21331012203 - 2⁴ = 21331012187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21331012243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1543000 + ... + 1556762.

It is an arithmetic number, because the mean of its divisors is an integer number (997201800).

Almost surely, 2^21331012203 is an apocalyptic number.

21331012203 is a deficient number, since it is larger than the sum of its proper divisors (10579445397).

21331012203 is a wasteful number, since it uses less digits than its factorization.

21331012203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14328 (or 14322 counting only the distinct ones).

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

Adding to 21331012203 its reverse (30221013312), we get a palindrome (51552025515).

The spelling of 21331012203 in words is "twenty-one billion, three hundred thirty-one million, twelve thousand, two hundred three".