240204121 has 2 divisors, whose sum is σ = 240204122. Its totient is φ = 240204120.

The previous prime is 240204119. The next prime is 240204131. The reversal of 240204121 is 121402042.

240204121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235315600 + 4888521 = 15340^2 + 2211^2 .

It is a cyclic number.

It is not a de Polignac number, because 240204121 - 2¹ = 240204119 is a prime.

Together with 240204119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 240204095 and 240204104.

It is not a weakly prime, because it can be changed into another prime (240204131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120102060 + 120102061.

It is an arithmetic number, because the mean of its divisors is an integer number (120102061).

Almost surely, 2^240204121 is an apocalyptic number.

It is an amenable number.

240204121 is a deficient number, since it is larger than the sum of its proper divisors (1).

240204121 is an equidigital number, since it uses as much as digits as its factorization.

240204121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 240204121 is about 15498.5199615963. The cubic root of 240204121 is about 621.6226322130.

Adding to 240204121 its reverse (121402042), we get a palindrome (361606163).

The spelling of 240204121 in words is "two hundred forty million, two hundred four thousand, one hundred twenty-one".