242143112111 has 4 divisors (see below), whose sum is σ = 242144107800. Its totient is φ = 242142116424.

The previous prime is 242143112089. The next prime is 242143112129. The reversal of 242143112111 is 111211341242.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 111211341242 = 2 ⋅55605670621.

It is a cyclic number.

It is not a de Polignac number, because 242143112111 - 2⁶ = 242143112047 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 (242143112171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135620 + ... + 708998.

It is an arithmetic number, because the mean of its divisors is an integer number (60536026950).

Almost surely, 2^242143112111 is an apocalyptic number.

242143112111 is a deficient number, since it is larger than the sum of its proper divisors (995689).

242143112111 is an equidigital number, since it uses as much as digits as its factorization.

242143112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995688.

The product of its digits is 384, while the sum is 23.

Adding to 242143112111 its reverse (111211341242), we get a palindrome (353354453353).

The spelling of 242143112111 in words is "two hundred forty-two billion, one hundred forty-three million, one hundred twelve thousand, one hundred eleven".