13221233020321 has 2 divisors, whose sum is σ = 13221233020322. Its totient is φ = 13221233020320.

The previous prime is 13221233020297. The next prime is 13221233020339. The reversal of 13221233020321 is 12302033212231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12968461380625 + 252771639696 = 3601175^2 + 502764^2 .

It is a cyclic number.

It is not a de Polignac number, because 13221233020321 - 2⁴³ = 4425139998113 is a prime.

It is not a weakly prime, because it can be changed into another prime (13221233020381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610616510160 + 6610616510161.

It is an arithmetic number, because the mean of its divisors is an integer number (6610616510161).

Almost surely, 2^{13221233020321} is an apocalyptic number.

It is an amenable number.

13221233020321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221233020321 is an equidigital number, since it uses as much as digits as its factorization.

13221233020321 is an odious number, because the sum of its binary digits is odd.

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

Adding to 13221233020321 its reverse (12302033212231), we get a palindrome (25523266232552).

The spelling of 13221233020321 in words is "thirteen trillion, two hundred twenty-one billion, two hundred thirty-three million, twenty thousand, three hundred twenty-one".