21310303330 has 32 divisors (see below), whose sum is σ = 38970558000. Its totient is φ = 8389170432.

The previous prime is 21310303253. The next prime is 21310303337. The reversal of 21310303330 is 3330301312.

It can be written as a sum of positive squares in 8 ways, for example, as 14189812641 + 7120490689 = 119121^2 + 84383^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21310303298 and 21310303307.

It is not an unprimeable number, because it can be changed into a prime (21310303337) 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 15 ways as a sum of consecutive naturals, for example, 96804 + ... + 228016.

Almost surely, 2^21310303330 is an apocalyptic number.

21310303330 is a deficient number, since it is larger than the sum of its proper divisors (17660254670).

21310303330 is a wasteful number, since it uses less digits than its factorization.

21310303330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131478.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 21310303330 its reverse (3330301312), we get a palindrome (24640604642).

The spelling of 21310303330 in words is "twenty-one billion, three hundred ten million, three hundred three thousand, three hundred thirty".