21330031032303 has 16 divisors (see below), whose sum is σ = 32503216605696. Its totient is φ = 12188472095520.

The previous prime is 21330031032293. The next prime is 21330031032347. The reversal of 21330031032303 is 30323013003312.

It is not a de Polignac number, because 21330031032303 - 2⁹ = 21330031031791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330031037303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2614803 + ... + 7035428.

It is an arithmetic number, because the mean of its divisors is an integer number (2031451037856).

Almost surely, 2^{21330031032303} is an apocalyptic number.

21330031032303 is a deficient number, since it is larger than the sum of its proper divisors (11173185573393).

21330031032303 is a wasteful number, since it uses less digits than its factorization.

21330031032303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9755494.

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 21330031032303 its reverse (30323013003312), we get a palindrome (51653044035615).

The spelling of 21330031032303 in words is "twenty-one trillion, three hundred thirty billion, thirty-one million, thirty-two thousand, three hundred three".