243121145111 has 8 divisors (see below), whose sum is σ = 261832028304. Its totient is φ = 224411584320.

The previous prime is 243121145077. The next prime is 243121145131. The reversal of 243121145111 is 111541121342.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243121145111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121145131) 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, 69155 + ... + 700731.

It is an arithmetic number, because the mean of its divisors is an integer number (32729003538).

Almost surely, 2^243121145111 is an apocalyptic number.

243121145111 is a deficient number, since it is larger than the sum of its proper divisors (18710883193).

243121145111 is a wasteful number, since it uses less digits than its factorization.

243121145111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661201.

The product of its digits is 960, while the sum is 26.

Adding to 243121145111 its reverse (111541121342), we get a palindrome (354662266453).

The spelling of 243121145111 in words is "two hundred forty-three billion, one hundred twenty-one million, one hundred forty-five thousand, one hundred eleven".