21300113231 has 4 divisors (see below), whose sum is σ = 21320976264. Its totient is φ = 21279250200.

The previous prime is 21300113189. The next prime is 21300113239. The reversal of 21300113231 is 13231100312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21300113231 is a prime.

It is a super-2 number, since 2×21300113231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300113239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10429985 + ... + 10432026.

It is an arithmetic number, because the mean of its divisors is an integer number (5330244066).

Almost surely, 2^21300113231 is an apocalyptic number.

21300113231 is a deficient number, since it is larger than the sum of its proper divisors (20863033).

21300113231 is a wasteful number, since it uses less digits than its factorization.

21300113231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20863032.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21300113231 its reverse (13231100312), we get a palindrome (34531213543).

The spelling of 21300113231 in words is "twenty-one billion, three hundred million, one hundred thirteen thousand, two hundred thirty-one".