120342121 has 2 divisors, whose sum is σ = 120342122. Its totient is φ = 120342120.

The previous prime is 120342119. The next prime is 120342139. The reversal of 120342121 is 121243021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89038096 + 31304025 = 9436^2 + 5595^2 .

It is a cyclic number.

It is not a de Polignac number, because 120342121 - 2¹ = 120342119 is a prime.

Together with 120342119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 120342095 and 120342104.

It is not a weakly prime, because it can be changed into another prime (120342161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60171060 + 60171061.

It is an arithmetic number, because the mean of its divisors is an integer number (60171061).

Almost surely, 2^120342121 is an apocalyptic number.

It is an amenable number.

120342121 is a deficient number, since it is larger than the sum of its proper divisors (1).

120342121 is an equidigital number, since it uses as much as digits as its factorization.

120342121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 120342121 is about 10970.0556516364. The cubic root of 120342121 is about 493.7107161824.

Adding to 120342121 its reverse (121243021), we get a palindrome (241585142).

The spelling of 120342121 in words is "one hundred twenty million, three hundred forty-two thousand, one hundred twenty-one".