13121548943 has 4 divisors (see below), whose sum is σ = 13426701288. Its totient is φ = 12816396600.

The previous prime is 13121548927. The next prime is 13121548949. The reversal of 13121548943 is 34984512131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34984512131 = 1307 ⋅26767033.

It is a cyclic number.

It is not a de Polignac number, because 13121548943 - 2⁴ = 13121548927 is a prime.

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 13121548943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121548949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152576108 + ... + 152576193.

It is an arithmetic number, because the mean of its divisors is an integer number (3356675322).

Almost surely, 2^13121548943 is an apocalyptic number.

13121548943 is a deficient number, since it is larger than the sum of its proper divisors (305152345).

13121548943 is an equidigital number, since it uses as much as digits as its factorization.

13121548943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305152344.

The product of its digits is 103680, while the sum is 41.

The spelling of 13121548943 in words is "thirteen billion, one hundred twenty-one million, five hundred forty-eight thousand, nine hundred forty-three".