21021103302303 has 8 divisors (see below), whose sum is σ = 30184148331568. Its totient is φ = 12936063570624.

The previous prime is 21021103302299. The next prime is 21021103302319. The reversal of 21021103302303 is 30320330112012.

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

It is not a de Polignac number, because 21021103302303 - 2² = 21021103302299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21021103302303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021103302373) 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, 269501324350 + ... + 269501324427.

It is an arithmetic number, because the mean of its divisors is an integer number (3773018541446).

Almost surely, 2^{21021103302303} is an apocalyptic number.

21021103302303 is a deficient number, since it is larger than the sum of its proper divisors (9163045029265).

21021103302303 is a wasteful number, since it uses less digits than its factorization.

21021103302303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539002648793.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21021103302303 its reverse (30320330112012), we get a palindrome (51341433414315).

The spelling of 21021103302303 in words is "twenty-one trillion, twenty-one billion, one hundred three million, three hundred two thousand, three hundred three".