13210221304421 has 8 divisors (see below), whose sum is σ = 13394793971160. Its totient is φ = 13025746225152.

The previous prime is 13210221304417. The next prime is 13210221304433. The reversal of 13210221304421 is 12440312201231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3189742420225 + 10020478884196 = 1785985^2 + 3165514^2 .

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 13210221304421 - 2² = 13210221304417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13210221304321) 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, 24124220 + ... + 24665733.

It is an arithmetic number, because the mean of its divisors is an integer number (1674349246395).

Almost surely, 2^{13210221304421} is an apocalyptic number.

It is an amenable number.

13210221304421 is a deficient number, since it is larger than the sum of its proper divisors (184572666739).

13210221304421 is an equidigital number, since it uses as much as digits as its factorization.

13210221304421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48793735.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 13210221304421 its reverse (12440312201231), we get a palindrome (25650533505652).

The spelling of 13210221304421 in words is "thirteen trillion, two hundred ten billion, two hundred twenty-one million, three hundred four thousand, four hundred twenty-one".