21331302003 has 12 divisors (see below), whose sum is σ = 33612960888. Its totient is φ = 12928061760.

The previous prime is 21331302001. The next prime is 21331302023. The reversal of 21331302003 is 30020313312.

It is not a de Polignac number, because 21331302003 - 2¹ = 21331302001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21331302001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107733750 + ... + 107733947.

It is an arithmetic number, because the mean of its divisors is an integer number (2801080074).

Almost surely, 2^21331302003 is an apocalyptic number.

21331302003 is a deficient number, since it is larger than the sum of its proper divisors (12281658885).

21331302003 is a wasteful number, since it uses less digits than its factorization.

21331302003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215467714 (or 215467711 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21331302003 its reverse (30020313312), we get a palindrome (51351615315).

The spelling of 21331302003 in words is "twenty-one billion, three hundred thirty-one million, three hundred two thousand, three".