21031322303 has 8 divisors (see below), whose sum is σ = 21188092800. Its totient is φ = 20874630168.

The previous prime is 21031322293. The next prime is 21031322327. The reversal of 21031322303 is 30322313012.

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 21031322303 - 2⁴ = 21031322287 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 (21031322803) 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, 589118 + ... + 623796.

It is an arithmetic number, because the mean of its divisors is an integer number (2648511600).

Almost surely, 2^21031322303 is an apocalyptic number.

21031322303 is a deficient number, since it is larger than the sum of its proper divisors (156770497).

21031322303 is a wasteful number, since it uses less digits than its factorization.

21031322303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39181.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21031322303 its reverse (30322313012), we get a palindrome (51353635315).

The spelling of 21031322303 in words is "twenty-one billion, thirty-one million, three hundred twenty-two thousand, three hundred three".