21332130133 has 4 divisors (see below), whose sum is σ = 21332465100. Its totient is φ = 21331795168.

The previous prime is 21332130119. The next prime is 21332130181. The reversal of 21332130133 is 33103123312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18528109924 + 2804020209 = 136118^2 + 52953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21332130133 is a prime.

It is a super-2 number, since 2×21332130133² (a number of 21 digits) 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 (21332130103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39208 + ... + 210241.

It is an arithmetic number, because the mean of its divisors is an integer number (5333116275).

Almost surely, 2^21332130133 is an apocalyptic number.

It is an amenable number.

21332130133 is a deficient number, since it is larger than the sum of its proper divisors (334967).

21332130133 is an equidigital number, since it uses as much as digits as its factorization.

21332130133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334966.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21332130133 its reverse (33103123312), we get a palindrome (54435253445).

The spelling of 21332130133 in words is "twenty-one billion, three hundred thirty-two million, one hundred thirty thousand, one hundred thirty-three".