243121134121 has 8 divisors (see below), whose sum is σ = 244336037760. Its totient is φ = 241907878128.

The previous prime is 243121134083. The next prime is 243121134163. The reversal of 243121134121 is 121431121342.

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 243121134121 - 2⁷ = 243121133993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243121134181) 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, 115531 + ... + 706816.

It is an arithmetic number, because the mean of its divisors is an integer number (30542004720).

Almost surely, 2^243121134121 is an apocalyptic number.

It is an amenable number.

243121134121 is a deficient number, since it is larger than the sum of its proper divisors (1214903639).

243121134121 is a wasteful number, since it uses less digits than its factorization.

243121134121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823823.

The product of its digits is 1152, while the sum is 25.

Adding to 243121134121 its reverse (121431121342), we get a palindrome (364552255463).

The spelling of 243121134121 in words is "two hundred forty-three billion, one hundred twenty-one million, one hundred thirty-four thousand, one hundred twenty-one".