13321030011221 has 4 divisors (see below), whose sum is σ = 13324800473292. Its totient is φ = 13317259549152.

The previous prime is 13321030011181. The next prime is 13321030011251. The reversal of 13321030011221 is 12211003012331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9409930488721 + 3911099522500 = 3067561^2 + 1977650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13321030011221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13321030011193 and 13321030011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321030011251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1885225736 + ... + 1885232801.

It is an arithmetic number, because the mean of its divisors is an integer number (3331200118323).

Almost surely, 2^{13321030011221} is an apocalyptic number.

It is an amenable number.

13321030011221 is a deficient number, since it is larger than the sum of its proper divisors (3770462071).

13321030011221 is an equidigital number, since it uses as much as digits as its factorization.

13321030011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770462070.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 13321030011221 its reverse (12211003012331), we get a palindrome (25532033023552).

The spelling of 13321030011221 in words is "thirteen trillion, three hundred twenty-one billion, thirty million, eleven thousand, two hundred twenty-one".