13323130221221 has 4 divisors (see below), whose sum is σ = 13323587508492. Its totient is φ = 13322672933952.

The previous prime is 13323130221217. The next prime is 13323130221307. The reversal of 13323130221221 is 12212203132331.

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 5639223837025 + 7683906384196 = 2374705^2 + 2771986^2 .

It is a cyclic number.

It is not a de Polignac number, because 13323130221221 - 2² = 13323130221217 is a prime.

It is a super-2 number, since 2×13323130221221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13323130221721) 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, 228599930 + ... + 228658203.

It is an arithmetic number, because the mean of its divisors is an integer number (3330896877123).

Almost surely, 2^{13323130221221} is an apocalyptic number.

It is an amenable number.

13323130221221 is a deficient number, since it is larger than the sum of its proper divisors (457287271).

13323130221221 is an equidigital number, since it uses as much as digits as its factorization.

13323130221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457287270.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 13323130221221 its reverse (12212203132331), we get a palindrome (25535333353552).

The spelling of 13323130221221 in words is "thirteen trillion, three hundred twenty-three billion, one hundred thirty million, two hundred twenty-one thousand, two hundred twenty-one".