21031330113 has 12 divisors (see below), whose sum is σ = 30673527040. Its totient is φ = 13884761016.

The previous prime is 21031330081. The next prime is 21031330141. The reversal of 21031330113 is 31103313012.

It is a happy number.

21031330113 is a `hidden beast` number, since 210 + 313 + 30 + 113 = 666.

It is not a de Polignac number, because 21031330113 - 2⁵ = 21031330081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21031330153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11342833 + ... + 11344686.

Almost surely, 2^21031330113 is an apocalyptic number.

It is an amenable number.

21031330113 is a deficient number, since it is larger than the sum of its proper divisors (9642196927).

21031330113 is a wasteful number, since it uses less digits than its factorization.

21031330113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22687628 (or 22687625 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 21031330113 its reverse (31103313012), we get a palindrome (52134643125).

The spelling of 21031330113 in words is "twenty-one billion, thirty-one million, three hundred thirty thousand, one hundred thirteen".