13120444342421 has 8 divisors (see below), whose sum is σ = 14232845857944. Its totient is φ = 12022776622080.

The previous prime is 13120444342403. The next prime is 13120444342471. The reversal of 13120444342421 is 12424344402131.

It can be written as a sum of positive squares in 4 ways, for example, as 1949067288100 + 11171377054321 = 1396090^2 + 3342361^2 .

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 13120444342421 - 2¹⁰ = 13120444341397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120444342471) 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, 3683446940 + ... + 3683450501.

It is an arithmetic number, because the mean of its divisors is an integer number (1779105732243).

Almost surely, 2^{13120444342421} is an apocalyptic number.

It is an amenable number.

13120444342421 is a deficient number, since it is larger than the sum of its proper divisors (1112401515523).

13120444342421 is a wasteful number, since it uses less digits than its factorization.

13120444342421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7366897591.

The product of its (nonzero) digits is 73728, while the sum is 35.

Adding to 13120444342421 its reverse (12424344402131), we get a palindrome (25544788744552).

The spelling of 13120444342421 in words is "thirteen trillion, one hundred twenty billion, four hundred forty-four million, three hundred forty-two thousand, four hundred twenty-one".