21033344333013 has 4 divisors (see below), whose sum is σ = 28044459110688. Its totient is φ = 14022229555340.

The previous prime is 21033344332981. The next prime is 21033344333021. The reversal of 21033344333013 is 31033344333012.

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 21033344333013 - 2⁵ = 21033344332981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033344133013) 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 3 ways as a sum of consecutive naturals, for example, 3505557388833 + ... + 3505557388838.

It is an arithmetic number, because the mean of its divisors is an integer number (7011114777672).

Almost surely, 2^{21033344333013} is an apocalyptic number.

It is an amenable number.

21033344333013 is a deficient number, since it is larger than the sum of its proper divisors (7011114777675).

21033344333013 is an equidigital number, since it uses as much as digits as its factorization.

21033344333013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7011114777674.

The product of its (nonzero) digits is 69984, while the sum is 33.

Adding to 21033344333013 its reverse (31033344333012), we get a palindrome (52066688666025).

Subtracting 21033344333013 from its reverse (31033344333012), we obtain a palindrome (9999999999999).

The spelling of 21033344333013 in words is "twenty-one trillion, thirty-three billion, three hundred forty-four million, three hundred thirty-three thousand, thirteen".