21031030303 has 8 divisors (see below), whose sum is σ = 21143258928. Its totient is φ = 20918857344.

The previous prime is 21031030301. The next prime is 21031030309. The reversal of 21031030303 is 30303013012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21031030303 - 2¹ = 21031030301 is a prime.

It is a Duffinian number.

21031030303 is a modest number, since divided by 30303 gives 21031 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031030301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 903175 + ... + 926167.

It is an arithmetic number, because the mean of its divisors is an integer number (2642907366).

Almost surely, 2^21031030303 is an apocalyptic number.

21031030303 is a deficient number, since it is larger than the sum of its proper divisors (112228625).

21031030303 is a wasteful number, since it uses less digits than its factorization.

21031030303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27833.

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 21031030303 its reverse (30303013012), we get a palindrome (51334043315).

The spelling of 21031030303 in words is "twenty-one billion, thirty-one million, thirty thousand, three hundred three".