21331003222321 has 8 divisors (see below), whose sum is σ = 23182600539560. Its totient is φ = 19509513178752.

The previous prime is 21331003222303. The next prime is 21331003222367. The reversal of 21331003222321 is 12322230013312.

It can be written as a sum of positive squares in 4 ways, for example, as 393240613921 + 20937762608400 = 627089^2 + 4575780^2 .

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 21331003222321 - 2⁹ = 21331003221809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21331003222121) 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, 7526816940 + ... + 7526819773.

It is an arithmetic number, because the mean of its divisors is an integer number (2897825067445).

Almost surely, 2^{21331003222321} is an apocalyptic number.

It is an amenable number.

21331003222321 is a deficient number, since it is larger than the sum of its proper divisors (1851597317239).

21331003222321 is a wasteful number, since it uses less digits than its factorization.

21331003222321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15053636835.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21331003222321 its reverse (12322230013312), we get a palindrome (33653233235633).

The spelling of 21331003222321 in words is "twenty-one trillion, three hundred thirty-one billion, three million, two hundred twenty-two thousand, three hundred twenty-one".