21104141321 has 4 divisors (see below), whose sum is σ = 21117610752. Its totient is φ = 21090671892.

The previous prime is 21104141293. The next prime is 21104141323. The reversal of 21104141321 is 12314140112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21104141321 - 2¹⁰ = 21104140297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21104141293 and 21104141302.

It is not an unprimeable number, because it can be changed into a prime (21104141323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6732365 + ... + 6735498.

It is an arithmetic number, because the mean of its divisors is an integer number (5279402688).

Almost surely, 2^21104141321 is an apocalyptic number.

It is an amenable number.

21104141321 is a deficient number, since it is larger than the sum of its proper divisors (13469431).

21104141321 is a wasteful number, since it uses less digits than its factorization.

21104141321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13469430.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21104141321 its reverse (12314140112), we get a palindrome (33418281433).

The spelling of 21104141321 in words is "twenty-one billion, one hundred four million, one hundred forty-one thousand, three hundred twenty-one".