21342032321 has 8 divisors (see below), whose sum is σ = 23239963200.
Its totient is φ = 19521568080.
The previous prime is 21342032317. The next prime is 21342032347. The reversal of 21342032321 is 12323024312.
Adding to 21342032321 its reverse (12323024312), we get a palindrome (33665056633).
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 21342032321 - 22 = 21342032317 is a prime.
It is a super-3 number, since 3×213420323213 (a number of 32 digits) contains 333 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (21342032381) 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, 19366085 + ... + 19367186.
It is an arithmetic number, because the mean of its divisors is an integer number (2904995400).
Almost surely, 221342032321 is an apocalyptic number.
It is an amenable number.
21342032321 is a deficient number, since it is larger than the sum of its proper divisors (1897930879).
21342032321 is a wasteful number, since it uses less digits than its factorization.
21342032321 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 38733319.
The product of its (nonzero) digits is 1728, while the sum is 23.
The spelling of 21342032321 in words is "twenty-one billion, three hundred forty-two million, thirty-two thousand, three hundred twenty-one".