243123512111 has 8 divisors (see below), whose sum is σ = 243638997840. Its totient is φ = 242608540608.

The previous prime is 243123512089. The next prime is 243123512117. The reversal of 243123512111 is 111215321342.

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-243123512111 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 (243123512117) 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, 825515 + ... + 1080611.

It is an arithmetic number, because the mean of its divisors is an integer number (30454874730).

Almost surely, 2^243123512111 is an apocalyptic number.

243123512111 is a deficient number, since it is larger than the sum of its proper divisors (515485729).

243123512111 is a wasteful number, since it uses less digits than its factorization.

243123512111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257113.

The product of its digits is 1440, while the sum is 26.

Adding to 243123512111 its reverse (111215321342), we get a palindrome (354338833453).

The spelling of 243123512111 in words is "two hundred forty-three billion, one hundred twenty-three million, five hundred twelve thousand, one hundred eleven".