243044121 has 16 divisors (see below), whose sum is σ = 343872000. Its totient is φ = 152164608.

The previous prime is 243044117. The next prime is 243044161. The reversal of 243044121 is 121440342.

It is not a de Polignac number, because 243044121 - 2² = 243044117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243044111) 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, 19455 + ... + 29403.

It is an arithmetic number, because the mean of its divisors is an integer number (21492000).

Almost surely, 2^243044121 is an apocalyptic number.

It is an amenable number.

243044121 is a deficient number, since it is larger than the sum of its proper divisors (100827879).

243044121 is a wasteful number, since it uses less digits than its factorization.

243044121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10448.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 243044121 is about 15589.8723856227. The cubic root of 243044121 is about 624.0629122754.

Adding to 243044121 its reverse (121440342), we get a palindrome (364484463).

The spelling of 243044121 in words is "two hundred forty-three million, forty-four thousand, one hundred twenty-one".