13263443434121 has 4 divisors (see below), whose sum is σ = 13273483892244. Its totient is φ = 13253402976000.

The previous prime is 13263443434097. The next prime is 13263443434183. The reversal of 13263443434121 is 12143434436231.

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 9140107074121 + 4123336360000 = 3023261^2 + 2030600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13263443434121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13263443439121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5020227080 + ... + 5020229721.

It is an arithmetic number, because the mean of its divisors is an integer number (3318370973061).

Almost surely, 2^{13263443434121} is an apocalyptic number.

It is an amenable number.

13263443434121 is a deficient number, since it is larger than the sum of its proper divisors (10040458123).

13263443434121 is a wasteful number, since it uses less digits than its factorization.

13263443434121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10040458122.

The product of its digits is 497664, while the sum is 41.

The spelling of 13263443434121 in words is "thirteen trillion, two hundred sixty-three billion, four hundred forty-three million, four hundred thirty-four thousand, one hundred twenty-one".