13261221341 has 4 divisors (see below), whose sum is σ = 13261875900. Its totient is φ = 13260566784.

The previous prime is 13261221299. The next prime is 13261221349. The reversal of 13261221341 is 14312216231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14312216231 = 13183 ⋅1085657.

It can be written as a sum of positive squares in 2 ways, for example, as 8925525625 + 4335695716 = 94475^2 + 65846^2 .

It is a cyclic number.

It is not a de Polignac number, because 13261221341 - 2¹⁰ = 13261220317 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 13261221341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13261221349) 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, 295886 + ... + 337743.

It is an arithmetic number, because the mean of its divisors is an integer number (3315468975).

Almost surely, 2^13261221341 is an apocalyptic number.

It is an amenable number.

13261221341 is a deficient number, since it is larger than the sum of its proper divisors (654559).

13261221341 is an equidigital number, since it uses as much as digits as its factorization.

13261221341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654558.

The product of its digits is 1728, while the sum is 26.

Adding to 13261221341 its reverse (14312216231), we get a palindrome (27573437572).

The spelling of 13261221341 in words is "thirteen billion, two hundred sixty-one million, two hundred twenty-one thousand, three hundred forty-one".