21330113 has 8 divisors (see below), whose sum is σ = 24431232. Its totient is φ = 18242496.

The previous prime is 21330097. The next prime is 21330119. The reversal of 21330113 is 31103312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21330113 - 2⁴ = 21330097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21330119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281 + ... + 6537.

It is an arithmetic number, because the mean of its divisors is an integer number (3053904).

Almost surely, 2^21330113 is an apocalyptic number.

It is an amenable number.

21330113 is a deficient number, since it is larger than the sum of its proper divisors (3101119).

21330113 is an equidigital number, since it uses as much as digits as its factorization.

21330113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6751.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 21330113 is about 4618.4535290506. The cubic root of 21330113 is about 277.3305536978.

Adding to 21330113 its reverse (31103312), we get a palindrome (52433425).

The spelling of 21330113 in words is "twenty-one million, three hundred thirty thousand, one hundred thirteen".