13121567841 has 4 divisors (see below), whose sum is σ = 17495423792. Its totient is φ = 8747711892.

The previous prime is 13121567839. The next prime is 13121567887. The reversal of 13121567841 is 14876512131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13121567841 - 2¹ = 13121567839 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 13121567841.

It is not an unprimeable number, because it can be changed into a prime (13121567821) 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, 2186927971 + ... + 2186927976.

It is an arithmetic number, because the mean of its divisors is an integer number (4373855948).

Almost surely, 2^13121567841 is an apocalyptic number.

It is an amenable number.

13121567841 is a deficient number, since it is larger than the sum of its proper divisors (4373855951).

13121567841 is an equidigital number, since it uses as much as digits as its factorization.

13121567841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4373855950.

The product of its digits is 40320, while the sum is 39.

The spelling of 13121567841 in words is "thirteen billion, one hundred twenty-one million, five hundred sixty-seven thousand, eight hundred forty-one".