13544521244121 has 32 divisors (see below), whose sum is σ = 21297548981248. Its totient is φ = 7494854754240.

The previous prime is 13544521244119. The next prime is 13544521244129. The reversal of 13544521244121 is 12144212544531.

It is a happy number.

It is not a de Polignac number, because 13544521244121 - 2¹ = 13544521244119 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 13544521244121.

It is not an unprimeable number, because it can be changed into a prime (13544521244129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41143675 + ... + 41471568.

It is an arithmetic number, because the mean of its divisors is an integer number (665548405664).

Almost surely, 2^{13544521244121} is an apocalyptic number.

It is an amenable number.

13544521244121 is a deficient number, since it is larger than the sum of its proper divisors (7753027737127).

13544521244121 is a wasteful number, since it uses less digits than its factorization.

13544521244121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82615501.

The product of its digits is 153600, while the sum is 39.

Adding to 13544521244121 its reverse (12144212544531), we get a palindrome (25688733788652).

The spelling of 13544521244121 in words is "thirteen trillion, five hundred forty-four billion, five hundred twenty-one million, two hundred forty-four thousand, one hundred twenty-one".