242123311 has 4 divisors (see below), whose sum is σ = 242154472. Its totient is φ = 242092152.

The previous prime is 242123281. The next prime is 242123317. The reversal of 242123311 is 113321242.

It is a happy number.

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: 113321242 = 2 ⋅56660621.

It is a cyclic number.

It is not a de Polignac number, because 242123311 - 2⁵ = 242123279 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 (242123317) 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, 6616 + ... + 22978.

It is an arithmetic number, because the mean of its divisors is an integer number (60538618).

Almost surely, 2^242123311 is an apocalyptic number.

242123311 is a deficient number, since it is larger than the sum of its proper divisors (31161).

242123311 is a wasteful number, since it uses less digits than its factorization.

242123311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31160.

The product of its digits is 288, while the sum is 19.

The square root of 242123311 is about 15560.3120469996. The cubic root of 242123311 is about 623.2737954579.

Adding to 242123311 its reverse (113321242), we get a palindrome (355444553).

The spelling of 242123311 in words is "two hundred forty-two million, one hundred twenty-three thousand, three hundred eleven".