242312121 has 32 divisors (see below), whose sum is σ = 364291200. Its totient is φ = 159174720.

The previous prime is 242312113. The next prime is 242312129. The reversal of 242312121 is 121213242.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (242312113) and next prime (242312129).

It is not a de Polignac number, because 242312121 - 2³ = 242312113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242312094 and 242312103.

It is not an unprimeable number, because it can be changed into a prime (242312129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 874635 + ... + 874911.

It is an arithmetic number, because the mean of its divisors is an integer number (11384100).

Almost surely, 2^242312121 is an apocalyptic number.

It is an amenable number.

242312121 is a deficient number, since it is larger than the sum of its proper divisors (121979079).

242312121 is a wasteful number, since it uses less digits than its factorization.

242312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 640 counting only the distinct ones).

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

The square root of 242312121 is about 15566.3779023895. The cubic root of 242312121 is about 623.4357649225.

Adding to 242312121 its reverse (121213242), we get a palindrome (363525363).

The spelling of 242312121 in words is "two hundred forty-two million, three hundred twelve thousand, one hundred twenty-one".