13121543041 has 4 divisors (see below), whose sum is σ = 13893398532. Its totient is φ = 12349687552.

The previous prime is 13121543027. The next prime is 13121543069. The reversal of 13121543041 is 14034512131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14034512131 = 8537 ⋅1643963.

It can be written as a sum of positive squares in 2 ways, for example, as 8081111025 + 5040432016 = 89895^2 + 70996^2 .

It is a cyclic number.

It is not a de Polignac number, because 13121543041 - 2⁹ = 13121542529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121542997 and 13121543015.

It is not an unprimeable number, because it can be changed into a prime (13121543341) 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, 385927720 + ... + 385927753.

It is an arithmetic number, because the mean of its divisors is an integer number (3473349633).

Almost surely, 2^13121543041 is an apocalyptic number.

It is an amenable number.

13121543041 is a deficient number, since it is larger than the sum of its proper divisors (771855491).

13121543041 is an equidigital number, since it uses as much as digits as its factorization.

13121543041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771855490.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 13121543041 in words is "thirteen billion, one hundred twenty-one million, five hundred forty-three thousand, forty-one".