21131030303303 has 4 divisors (see below), whose sum is σ = 21132472020240. Its totient is φ = 21129588586368.

The previous prime is 21131030303249. The next prime is 21131030303321. The reversal of 21131030303303 is 30330303013112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21131030303303 - 2⁶ = 21131030303239 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 (21131030323303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720836483 + ... + 720865796.

It is an arithmetic number, because the mean of its divisors is an integer number (5283118005060).

Almost surely, 2^{21131030303303} is an apocalyptic number.

21131030303303 is a deficient number, since it is larger than the sum of its proper divisors (1441716937).

21131030303303 is a wasteful number, since it uses less digits than its factorization.

21131030303303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441716936.

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 21131030303303 its reverse (30330303013112), we get a palindrome (51461333316415).

The spelling of 21131030303303 in words is "twenty-one trillion, one hundred thirty-one billion, thirty million, three hundred three thousand, three hundred three".