16545520231121 has 8 divisors (see below), whose sum is σ = 19311488659200. Its totient is φ = 13880132473248.

The previous prime is 16545520231109. The next prime is 16545520231127. The reversal of 16545520231121 is 12113202554561.

16545520231121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16545520231121 - 2²⁶ = 16545453122257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16545520231127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25145167196 + ... + 25145167853.

It is an arithmetic number, because the mean of its divisors is an integer number (2413936082400).

Almost surely, 2^{16545520231121} is an apocalyptic number.

It is an amenable number.

16545520231121 is a deficient number, since it is larger than the sum of its proper divisors (2765968428079).

16545520231121 is an equidigital number, since it uses as much as digits as its factorization.

16545520231121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50290335103.

The product of its (nonzero) digits is 72000, while the sum is 38.

Adding to 16545520231121 its reverse (12113202554561), we get a palindrome (28658722785682).

The spelling of 16545520231121 in words is "sixteen trillion, five hundred forty-five billion, five hundred twenty million, two hundred thirty-one thousand, one hundred twenty-one".