243201121 has 8 divisors (see below), whose sum is σ = 256144320. Its totient is φ = 230272272.

The previous prime is 243201113. The next prime is 243201131. The reversal of 243201121 is 121102342.

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

It is a cyclic number.

It is not a de Polignac number, because 243201121 - 2³ = 243201113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243201095 and 243201104.

It is not an unprimeable number, because it can be changed into a prime (243201131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65316 + ... + 68938.

It is an arithmetic number, because the mean of its divisors is an integer number (32018040).

Almost surely, 2^243201121 is an apocalyptic number.

It is an amenable number.

243201121 is a deficient number, since it is larger than the sum of its proper divisors (12943199).

243201121 is a wasteful number, since it uses less digits than its factorization.

243201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7175.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 243201121 is about 15594.9068929571. The cubic root of 243201121 is about 624.1972593333.

Adding to 243201121 its reverse (121102342), we get a palindrome (364303463).

The spelling of 243201121 in words is "two hundred forty-three million, two hundred one thousand, one hundred twenty-one".