21120310303 has 8 divisors (see below), whose sum is σ = 22093553376. Its totient is φ = 20151648000.

The previous prime is 21120310291. The next prime is 21120310319. The reversal of 21120310303 is 30301302112.

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 21120310303 - 2¹⁷ = 21120179231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120410303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1135758 + ... + 1154203.

It is an arithmetic number, because the mean of its divisors is an integer number (2761694172).

Almost surely, 2^21120310303 is an apocalyptic number.

21120310303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21120310303 is a deficient number, since it is larger than the sum of its proper divisors (973243073).

21120310303 is a wasteful number, since it uses less digits than its factorization.

21120310303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290385.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21120310303 its reverse (30301302112), we get a palindrome (51421612415).

The spelling of 21120310303 in words is "twenty-one billion, one hundred twenty million, three hundred ten thousand, three hundred three".