21003332002321 has 8 divisors (see below), whose sum is σ = 21916696382784. Its totient is φ = 20089982291280.

The previous prime is 21003332002297. The next prime is 21003332002357. The reversal of 21003332002321 is 12320023330012.

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

It is a cyclic number.

It is not a de Polignac number, because 21003332002321 - 2²¹ = 21003329905169 is a prime.

It is a super-2 number, since 2×21003332002321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21003332002292 and 21003332002301.

It is not an unprimeable number, because it can be changed into a prime (21003332002381) 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, 690106 + ... + 6517891.

It is an arithmetic number, because the mean of its divisors is an integer number (2739587047848).

Almost surely, 2^{21003332002321} is an apocalyptic number.

It is an amenable number.

21003332002321 is a deficient number, since it is larger than the sum of its proper divisors (913364380463).

21003332002321 is a wasteful number, since it uses less digits than its factorization.

21003332002321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7334711.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21003332002321 its reverse (12320023330012), we get a palindrome (33323355332333).

The spelling of 21003332002321 in words is "twenty-one trillion, three billion, three hundred thirty-two million, two thousand, three hundred twenty-one".