160221117 has 16 divisors (see below), whose sum is σ = 245768192. Its totient is φ = 90946800.

The previous prime is 160221109. The next prime is 160221121. The reversal of 160221117 is 711122061.

It is a happy number.

It is not a de Polignac number, because 160221117 - 2³ = 160221109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 160221093 and 160221102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160221157) 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, 22093 + ... + 28434.

It is an arithmetic number, because the mean of its divisors is an integer number (15360512).

Almost surely, 2^160221117 is an apocalyptic number.

It is an amenable number.

160221117 is a deficient number, since it is larger than the sum of its proper divisors (85547075).

160221117 is a wasteful number, since it uses less digits than its factorization.

160221117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50688.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 160221117 is about 12657.8480398526. The cubic root of 160221117 is about 543.1334931532.

Adding to 160221117 its reverse (711122061), we get a palindrome (871343178).

The spelling of 160221117 in words is "one hundred sixty million, two hundred twenty-one thousand, one hundred seventeen".