21131112210303 has 16 divisors (see below), whose sum is σ = 28938870028640. Its totient is φ = 13705448956416.

The previous prime is 21131112210277. The next prime is 21131112210343. The reversal of 21131112210303 is 30301221113112.

It is not a de Polignac number, because 21131112210303 - 2¹⁰ = 21131112209279 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 21131112210303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131112210343) 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, 7206118 + ... + 9705171.

It is an arithmetic number, because the mean of its divisors is an integer number (1808679376790).

Almost surely, 2^{21131112210303} is an apocalyptic number.

21131112210303 is a deficient number, since it is larger than the sum of its proper divisors (7807757818337).

21131112210303 is a wasteful number, since it uses less digits than its factorization.

21131112210303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16922586.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21131112210303 its reverse (30301221113112), we get a palindrome (51432333323415).

The spelling of 21131112210303 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred twelve million, two hundred ten thousand, three hundred three".