168081121 has 16 divisors (see below), whose sum is σ = 186855424. Its totient is φ = 150185664.

The previous prime is 168081103. The next prime is 168081127. The reversal of 168081121 is 121180861.

It is not a de Polignac number, because 168081121 - 2⁹ = 168080609 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 168081121.

It is not an unprimeable number, because it can be changed into a prime (168081127) 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, 106480 + ... + 108046.

It is an arithmetic number, because the mean of its divisors is an integer number (11678464).

Almost surely, 2^168081121 is an apocalyptic number.

It is an amenable number.

168081121 is a deficient number, since it is larger than the sum of its proper divisors (18774303).

168081121 is a wasteful number, since it uses less digits than its factorization.

168081121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840.

The product of its (nonzero) digits is 768, while the sum is 28.

The square root of 168081121 is about 12964.6103296628. The cubic root of 168081121 is about 551.8736331632.

The spelling of 168081121 in words is "one hundred sixty-eight million, eighty-one thousand, one hundred twenty-one".