21113301 has 16 divisors (see below), whose sum is σ = 31426560. Its totient is φ = 12497520.

The previous prime is 21113299. The next prime is 21113317. The reversal of 21113301 is 10331112.

It is not a de Polignac number, because 21113301 - 2¹ = 21113299 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113101) 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 15 ways as a sum of consecutive naturals, for example, 6021 + ... + 8858.

It is an arithmetic number, because the mean of its divisors is an integer number (1964160).

Almost surely, 2^21113301 is an apocalyptic number.

It is an amenable number.

21113301 is a deficient number, since it is larger than the sum of its proper divisors (10313259).

21113301 is a wasteful number, since it uses less digits than its factorization.

21113301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14936.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 21113301 is about 4594.9212180406. The cubic root of 21113301 is about 276.3877007784.

Adding to 21113301 its reverse (10331112), we get a palindrome (31444413).

The spelling of 21113301 in words is "twenty-one million, one hundred thirteen thousand, three hundred one".