21303112303 has 8 divisors (see below), whose sum is σ = 24462904320. Its totient is φ = 18347177880.

The previous prime is 21303112247. The next prime is 21303112307. The reversal of 21303112303 is 30321130312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21303112303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303112307) 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, 50964175 + ... + 50964592.

It is an arithmetic number, because the mean of its divisors is an integer number (3057863040).

Almost surely, 2^21303112303 is an apocalyptic number.

21303112303 is a deficient number, since it is larger than the sum of its proper divisors (3159792017).

21303112303 is a wasteful number, since it uses less digits than its factorization.

21303112303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101928797.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21303112303 its reverse (30321130312), we get a palindrome (51624242615).

The spelling of 21303112303 in words is "twenty-one billion, three hundred three million, one hundred twelve thousand, three hundred three".