21301333133 has 4 divisors (see below), whose sum is σ = 21306338880. Its totient is φ = 21296327388.

The previous prime is 21301333127. The next prime is 21301333153. The reversal of 21301333133 is 33133310312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21301333133 - 2¹⁴ = 21301316749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21301333099 and 21301333108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301333103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2496485 + ... + 2505002.

It is an arithmetic number, because the mean of its divisors is an integer number (5326584720).

Almost surely, 2^21301333133 is an apocalyptic number.

It is an amenable number.

21301333133 is a deficient number, since it is larger than the sum of its proper divisors (5005747).

21301333133 is an equidigital number, since it uses as much as digits as its factorization.

21301333133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005746.

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

Adding to 21301333133 its reverse (33133310312), we get a palindrome (54434643445).

The spelling of 21301333133 in words is "twenty-one billion, three hundred one million, three hundred thirty-three thousand, one hundred thirty-three".