21300133133 has 8 divisors (see below), whose sum is σ = 21408504120. Its totient is φ = 21192021760.

The previous prime is 21300133117. The next prime is 21300133147. The reversal of 21300133133 is 33133100312.

It can be written as a sum of positive squares in 4 ways, for example, as 101646724 + 21198486409 = 10082^2 + 145597^2 .

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 21300133133 - 2⁴ = 21300133117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300130133) 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, 100673 + ... + 229641.

It is an arithmetic number, because the mean of its divisors is an integer number (2676063015).

Almost surely, 2^21300133133 is an apocalyptic number.

It is an amenable number.

21300133133 is a deficient number, since it is larger than the sum of its proper divisors (108370987).

21300133133 is a wasteful number, since it uses less digits than its factorization.

21300133133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129807.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 21300133133 its reverse (33133100312), we get a palindrome (54433233445).

The spelling of 21300133133 in words is "twenty-one billion, three hundred million, one hundred thirty-three thousand, one hundred thirty-three".