20168121 has 8 divisors (see below), whose sum is σ = 27152320. Its totient is φ = 13314672.

The previous prime is 20168119. The next prime is 20168129. The reversal of 20168121 is 12186102.

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

It is not a de Polignac number, because 20168121 - 2¹ = 20168119 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20168129) 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, 32326 + ... + 32943.

It is an arithmetic number, because the mean of its divisors is an integer number (3394040).

Almost surely, 2^20168121 is an apocalyptic number.

It is an amenable number.

20168121 is a deficient number, since it is larger than the sum of its proper divisors (6984199).

20168121 is a wasteful number, since it uses less digits than its factorization.

20168121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65375.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 20168121 is about 4490.8931183006. The cubic root of 20168121 is about 272.2002247269.

The spelling of 20168121 in words is "twenty million, one hundred sixty-eight thousand, one hundred twenty-one".