242123121 has 16 divisors (see below), whose sum is σ = 358945920. Its totient is φ = 161305200.

The previous prime is 242123111. The next prime is 242123143. The reversal of 242123121 is 121321242.

It is a happy number.

242123121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 242123121 - 2¹⁴ = 242106737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242123094 and 242123103.

It is not an unprimeable number, because it can be changed into a prime (242123111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63571 + ... + 67271.

It is an arithmetic number, because the mean of its divisors is an integer number (22434120).

Almost surely, 2^242123121 is an apocalyptic number.

It is an amenable number.

242123121 is a deficient number, since it is larger than the sum of its proper divisors (116822799).

242123121 is a wasteful number, since it uses less digits than its factorization.

242123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6133 (or 6127 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 242123121 is about 15560.3059417224. The cubic root of 242123121 is about 623.2736324252.

Adding to 242123121 its reverse (121321242), we get a palindrome (363444363).

The spelling of 242123121 in words is "two hundred forty-two million, one hundred twenty-three thousand, one hundred twenty-one".