13201221023121 has 8 divisors (see below), whose sum is σ = 17601681141504. Its totient is φ = 8800787460080.

The previous prime is 13201221023047. The next prime is 13201221023141. The reversal of 13201221023121 is 12132012210231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13201221023121 - 2¹⁰ = 13201221022097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13201221023141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5448390 + ... + 7489151.

It is an arithmetic number, because the mean of its divisors is an integer number (2200210142688).

Almost surely, 2^{13201221023121} is an apocalyptic number.

It is an amenable number.

13201221023121 is a deficient number, since it is larger than the sum of its proper divisors (4400460118383).

13201221023121 is a wasteful number, since it uses less digits than its factorization.

13201221023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13277671.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 13201221023121 its reverse (12132012210231), we get a palindrome (25333233233352).

The spelling of 13201221023121 in words is "thirteen trillion, two hundred one billion, two hundred twenty-one million, twenty-three thousand, one hundred twenty-one".