13123500341221 has 4 divisors (see below), whose sum is σ = 13303274318572. Its totient is φ = 12943726363872.

The previous prime is 13123500341209. The next prime is 13123500341227. The reversal of 13123500341221 is 12214300532131.

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 6131759585121 + 6991740756100 = 2476239^2 + 2644190^2 .

It is a cyclic number.

It is not a de Polignac number, because 13123500341221 - 2³⁷ = 12986061387749 is a prime.

It is a super-2 number, since 2×13123500341221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13123500341221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123500341227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89886988566 + ... + 89886988711.

It is an arithmetic number, because the mean of its divisors is an integer number (3325818579643).

Almost surely, 2^{13123500341221} is an apocalyptic number.

It is an amenable number.

13123500341221 is a deficient number, since it is larger than the sum of its proper divisors (179773977351).

13123500341221 is an equidigital number, since it uses as much as digits as its factorization.

13123500341221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179773977350.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 13123500341221 its reverse (12214300532131), we get a palindrome (25337800873352).

The spelling of 13123500341221 in words is "thirteen trillion, one hundred twenty-three billion, five hundred million, three hundred forty-one thousand, two hundred twenty-one".