21331313013333 has 4 divisors (see below), whose sum is σ = 28441750684448. Its totient is φ = 14220875342220.

The previous prime is 21331313013317. The next prime is 21331313013337. The reversal of 21331313013333 is 33331031313312.

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 not a de Polignac number, because 21331313013333 - 2⁴ = 21331313013317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21331313013333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331313013337) 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, 3555218835553 + ... + 3555218835558.

It is an arithmetic number, because the mean of its divisors is an integer number (7110437671112).

Almost surely, 2^{21331313013333} is an apocalyptic number.

It is an amenable number.

21331313013333 is a deficient number, since it is larger than the sum of its proper divisors (7110437671115).

21331313013333 is an equidigital number, since it uses as much as digits as its factorization.

21331313013333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7110437671114.

The product of its (nonzero) digits is 13122, while the sum is 30.

Adding to 21331313013333 its reverse (33331031313312), we get a palindrome (54662344326645).

The spelling of 21331313013333 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred thirteen million, thirteen thousand, three hundred thirty-three".