163311121 has 4 divisors (see below), whose sum is σ = 164024500. Its totient is φ = 162597744.

The previous prime is 163311101. The next prime is 163311133. The reversal of 163311121 is 121113361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 157377025 + 5934096 = 12545^2 + 2436^2 .

It is a cyclic number.

It is not a de Polignac number, because 163311121 - 2⁵ = 163311089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163311101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356346 + ... + 356803.

It is an arithmetic number, because the mean of its divisors is an integer number (41006125).

Almost surely, 2^163311121 is an apocalyptic number.

It is an amenable number.

163311121 is a deficient number, since it is larger than the sum of its proper divisors (713379).

163311121 is an equidigital number, since it uses as much as digits as its factorization.

163311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713378.

The product of its digits is 108, while the sum is 19.

The square root of 163311121 is about 12779.3239649052. The cubic root of 163311121 is about 546.6028854714.

Adding to 163311121 its reverse (121113361), we get a palindrome (284424482).

The spelling of 163311121 in words is "one hundred sixty-three million, three hundred eleven thousand, one hundred twenty-one".