21130323303 has 16 divisors (see below), whose sum is σ = 28946948096. Its totient is φ = 13700599200.

The previous prime is 21130323143. The next prime is 21130323329. The reversal of 21130323303 is 30332303112.

It is not a de Polignac number, because 21130323303 - 2¹² = 21130319207 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 21130323303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130323803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245850 + ... + 320472.

It is an arithmetic number, because the mean of its divisors is an integer number (1809184256).

Almost surely, 2^21130323303 is an apocalyptic number.

21130323303 is a deficient number, since it is larger than the sum of its proper divisors (7816624793).

21130323303 is a wasteful number, since it uses less digits than its factorization.

21130323303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77214.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21130323303 its reverse (30332303112), we get a palindrome (51462626415).

The spelling of 21130323303 in words is "twenty-one billion, one hundred thirty million, three hundred twenty-three thousand, three hundred three".