243022121 has 8 divisors (see below), whose sum is σ = 247964640. Its totient is φ = 238107168.

The previous prime is 243022093. The next prime is 243022127. The reversal of 243022121 is 121220342.

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 243022121 - 2⁶ = 243022057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243022121.

It is not an unprimeable number, because it can be changed into a prime (243022127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11405 + ... + 24821.

It is an arithmetic number, because the mean of its divisors is an integer number (30995580).

Almost surely, 2^243022121 is an apocalyptic number.

It is an amenable number.

243022121 is a deficient number, since it is larger than the sum of its proper divisors (4942519).

243022121 is a wasteful number, since it uses less digits than its factorization.

243022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13783.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 243022121 is about 15589.1667833788. The cubic root of 243022121 is about 624.0440819518.

Adding to 243022121 its reverse (121220342), we get a palindrome (364242463).

The spelling of 243022121 in words is "two hundred forty-three million, twenty-two thousand, one hundred twenty-one".