243011121 has 24 divisors (see below), whose sum is σ = 343412064. Its totient is φ = 152832960.

The previous prime is 243011117. The next prime is 243011149. The reversal of 243011121 is 121110342.

243011121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243011121 - 2² = 243011117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243011121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243011101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 494686 + ... + 495176.

It is an arithmetic number, because the mean of its divisors is an integer number (14308836).

Almost surely, 2^243011121 is an apocalyptic number.

It is an amenable number.

243011121 is a deficient number, since it is larger than the sum of its proper divisors (100400943).

243011121 is a wasteful number, since it uses less digits than its factorization.

243011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 243011121 is about 15588.8139702801. The cubic root of 243011121 is about 624.0346663638.

Adding to 243011121 its reverse (121110342), we get a palindrome (364121463).

The spelling of 243011121 in words is "two hundred forty-three million, eleven thousand, one hundred twenty-one".