21411345403321 has 8 divisors (see below), whose sum is σ = 21565493771360. Its totient is φ = 21257198605728.

The previous prime is 21411345403319. The next prime is 21411345403333. The reversal of 21411345403321 is 12330454311412.

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 21411345403321 - 2¹ = 21411345403319 is a prime.

It is a super-3 number, since 3×21411345403321³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21411345403421) 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, 53373130 + ... + 53772796.

It is an arithmetic number, because the mean of its divisors is an integer number (2695686721420).

Almost surely, 2^{21411345403321} is an apocalyptic number.

It is an amenable number.

21411345403321 is a deficient number, since it is larger than the sum of its proper divisors (154148368039).

21411345403321 is a wasteful number, since it uses less digits than its factorization.

21411345403321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785223.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 21411345403321 its reverse (12330454311412), we get a palindrome (33741799714733).

The spelling of 21411345403321 in words is "twenty-one trillion, four hundred eleven billion, three hundred forty-five million, four hundred three thousand, three hundred twenty-one".