13121340541 has 4 divisors (see below), whose sum is σ = 13691833632. Its totient is φ = 12550847452.

The previous prime is 13121340517. The next prime is 13121340593. The reversal of 13121340541 is 14504312131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14504312131 = 19 ⋅763384849.

It is a cyclic number.

It is not a de Polignac number, because 13121340541 - 2¹⁹ = 13120816253 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 (13121344541) 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, 285246511 + ... + 285246556.

It is an arithmetic number, because the mean of its divisors is an integer number (3422958408).

Almost surely, 2^13121340541 is an apocalyptic number.

It is an amenable number.

13121340541 is a deficient number, since it is larger than the sum of its proper divisors (570493091).

13121340541 is an equidigital number, since it uses as much as digits as its factorization.

13121340541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570493090.

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

Adding to 13121340541 its reverse (14504312131), we get a palindrome (27625652672).

The spelling of 13121340541 in words is "thirteen billion, one hundred twenty-one million, three hundred forty thousand, five hundred forty-one".