120424121 has 2 divisors, whose sum is σ = 120424122. Its totient is φ = 120424120.

The previous prime is 120424111. The next prime is 120424189. The reversal of 120424121 is 121424021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89510521 + 30913600 = 9461^2 + 5560^2 .

It is an emirp because it is prime and its reverse (121424021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120424121 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120424121.

It is not a weakly prime, because it can be changed into another prime (120424111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60212060 + 60212061.

It is an arithmetic number, because the mean of its divisors is an integer number (60212061).

Almost surely, 2^120424121 is an apocalyptic number.

It is an amenable number.

120424121 is a deficient number, since it is larger than the sum of its proper divisors (1).

120424121 is an equidigital number, since it uses as much as digits as its factorization.

120424121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 120424121 is about 10973.7924620434. The cubic root of 120424121 is about 493.8228273497.

Adding to 120424121 its reverse (121424021), we get a palindrome (241848142).

The spelling of 120424121 in words is "one hundred twenty million, four hundred twenty-four thousand, one hundred twenty-one".