181105121 has 16 divisors (see below), whose sum is σ = 192614400. Its totient is φ = 170045568.

The previous prime is 181105109. The next prime is 181105139. The reversal of 181105121 is 121501181.

It is a cyclic number.

It is not a de Polignac number, because 181105121 - 2¹⁴ = 181088737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 181105093 and 181105102.

It is not an unprimeable number, because it can be changed into a prime (181105921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140960 + ... + 142238.

It is an arithmetic number, because the mean of its divisors is an integer number (12038400).

Almost surely, 2^181105121 is an apocalyptic number.

It is an amenable number.

181105121 is a deficient number, since it is larger than the sum of its proper divisors (11509279).

181105121 is a wasteful number, since it uses less digits than its factorization.

181105121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448.

The product of its (nonzero) digits is 80, while the sum is 20.

The square root of 181105121 is about 13457.5302711902. The cubic root of 181105121 is about 565.7747702291.

The spelling of 181105121 in words is "one hundred eighty-one million, one hundred five thousand, one hundred twenty-one".