242240121 has 6 divisors (see below), whose sum is σ = 349902410. Its totient is φ = 161493408.

The previous prime is 242240087. The next prime is 242240171. The reversal of 242240121 is 121042242.

242240121 is a `hidden beast` number, since 242 + 2 + 401 + 21 = 666.

242240121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 242238096 + 2025 = 15564^2 + 45^2 .

It is not a de Polignac number, because 242240121 - 2⁷ = 242239993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242240094 and 242240103.

It is not an unprimeable number, because it can be changed into a prime (242240171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13457776 + ... + 13457793.

Almost surely, 2^242240121 is an apocalyptic number.

It is an amenable number.

242240121 is a deficient number, since it is larger than the sum of its proper divisors (107662289).

242240121 is a wasteful number, since it uses less digits than its factorization.

242240121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26915575 (or 26915572 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 242240121 is about 15564.0650538347. The cubic root of 242240121 is about 623.3740101060.

Adding to 242240121 its reverse (121042242), we get a palindrome (363282363).

The spelling of 242240121 in words is "two hundred forty-two million, two hundred forty thousand, one hundred twenty-one".