13140240344221 has 4 divisors (see below), whose sum is σ = 13140575516700. Its totient is φ = 13139905171744.

The previous prime is 13140240344213. The next prime is 13140240344237. The reversal of 13140240344221 is 12244304204131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12396525556900 + 743714787321 = 3520870^2 + 862389^2 .

It is a cyclic number.

It is not a de Polignac number, because 13140240344221 - 2³ = 13140240344213 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 (13140240314221) 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, 167527426 + ... + 167605843.

It is an arithmetic number, because the mean of its divisors is an integer number (3285143879175).

Almost surely, 2^{13140240344221} is an apocalyptic number.

It is an amenable number.

13140240344221 is a deficient number, since it is larger than the sum of its proper divisors (335172479).

13140240344221 is an equidigital number, since it uses as much as digits as its factorization.

13140240344221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335172478.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 13140240344221 its reverse (12244304204131), we get a palindrome (25384544548352).

The spelling of 13140240344221 in words is "thirteen trillion, one hundred forty billion, two hundred forty million, three hundred forty-four thousand, two hundred twenty-one".