163332121 has 4 divisors (see below), whose sum is σ = 164777652. Its totient is φ = 161886592.

The previous prime is 163332083. The next prime is 163332133. The reversal of 163332121 is 121233361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121233361 = 3767 ⋅32183.

It can be written as a sum of positive squares in 2 ways, for example, as 2676496 + 160655625 = 1636^2 + 12675^2 .

It is a cyclic number.

It is not a de Polignac number, because 163332121 - 2¹¹ = 163330073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163332092 and 163332101.

It is not an unprimeable number, because it can be changed into a prime (163392121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722596 + ... + 722821.

It is an arithmetic number, because the mean of its divisors is an integer number (41194413).

Almost surely, 2^163332121 is an apocalyptic number.

It is an amenable number.

163332121 is a deficient number, since it is larger than the sum of its proper divisors (1445531).

163332121 is a wasteful number, since it uses less digits than its factorization.

163332121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445530.

The product of its digits is 648, while the sum is 22.

The square root of 163332121 is about 12780.1455782006. The cubic root of 163332121 is about 546.6263134914.

Adding to 163332121 its reverse (121233361), we get a palindrome (284565482).

The spelling of 163332121 in words is "one hundred sixty-three million, three hundred thirty-two thousand, one hundred twenty-one".