21033303003 has 12 divisors (see below), whose sum is σ = 30397344120. Its totient is φ = 14014860576.

The previous prime is 21033303001. The next prime is 21033303043. The reversal of 21033303003 is 30030333012.

It is not a de Polignac number, because 21033303003 - 2¹ = 21033303001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21033303001) 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 11 ways as a sum of consecutive naturals, for example, 593613 + ... + 628046.

It is an arithmetic number, because the mean of its divisors is an integer number (2533112010).

Almost surely, 2^21033303003 is an apocalyptic number.

21033303003 is a deficient number, since it is larger than the sum of its proper divisors (9364041117).

21033303003 is a wasteful number, since it uses less digits than its factorization.

21033303003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223578 (or 1223575 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 18.

Adding to 21033303003 its reverse (30030333012), we get a palindrome (51063636015).

The spelling of 21033303003 in words is "twenty-one billion, thirty-three million, three hundred three thousand, three".