21303331133 has 8 divisors (see below), whose sum is σ = 24376253568. Its totient is φ = 18237806064.

The previous prime is 21303331121. The next prime is 21303331139. The reversal of 21303331133 is 33113330312.

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 21303331133 - 2²⁰ = 21302282557 is a prime.

It is a super-3 number, since 3×21303331133³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21303331099 and 21303331108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303331139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1843166 + ... + 1854687.

It is an arithmetic number, because the mean of its divisors is an integer number (3047031696).

Almost surely, 2^21303331133 is an apocalyptic number.

It is an amenable number.

21303331133 is a deficient number, since it is larger than the sum of its proper divisors (3072922435).

21303331133 is an equidigital number, since it uses as much as digits as its factorization.

21303331133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3698683.

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 21303331133 its reverse (33113330312), we get a palindrome (54416661445).

The spelling of 21303331133 in words is "twenty-one billion, three hundred three million, three hundred thirty-one thousand, one hundred thirty-three".