21133301 has 12 divisors (see below), whose sum is σ = 25493472. Its totient is φ = 17158824.

The previous prime is 21133291. The next prime is 21133303. The reversal of 21133301 is 10333112.

It is not a de Polignac number, because 21133301 - 2⁶ = 21133237 is a prime.

It is a super-2 number, since 2×21133301² = 893232822313202, which 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 (21133303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1655 + ... + 6708.

It is an arithmetic number, because the mean of its divisors is an integer number (2124456).

Almost surely, 2^21133301 is an apocalyptic number.

It is an amenable number.

21133301 is a deficient number, since it is larger than the sum of its proper divisors (4360171).

21133301 is an equidigital number, since it uses as much as digits as its factorization.

21133301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8408 (or 8389 counting only the distinct ones).

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

The square root of 21133301 is about 4597.0970187717. The cubic root of 21133301 is about 276.4749445101.

Adding to 21133301 its reverse (10333112), we get a palindrome (31466413).

The spelling of 21133301 in words is "twenty-one million, one hundred thirty-three thousand, three hundred one".