21321003323013 has 8 divisors (see below), whose sum is σ = 29121370392576. Its totient is φ = 13867319234400.

The previous prime is 21321003322999. The next prime is 21321003323083. The reversal of 21321003323013 is 31032330012312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21321003323013 - 2⁵ = 21321003322981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321003323083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86670745093 + ... + 86670745338.

It is an arithmetic number, because the mean of its divisors is an integer number (3640171299072).

Almost surely, 2^{21321003323013} is an apocalyptic number.

It is an amenable number.

21321003323013 is a deficient number, since it is larger than the sum of its proper divisors (7800367069563).

21321003323013 is a wasteful number, since it uses less digits than its factorization.

21321003323013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173341490475.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21321003323013 its reverse (31032330012312), we get a palindrome (52353333335325).

The spelling of 21321003323013 in words is "twenty-one trillion, three hundred twenty-one billion, three million, three hundred twenty-three thousand, thirteen".