384012121 has 2 divisors, whose sum is σ = 384012122. Its totient is φ = 384012120.

The previous prime is 384012107. The next prime is 384012131. The reversal of 384012121 is 121210483.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312016896 + 71995225 = 17664^2 + 8485^2 .

It is a cyclic number.

It is not a de Polignac number, because 384012121 - 2⁵ = 384012089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 384012092 and 384012101.

It is not a weakly prime, because it can be changed into another prime (384012131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192006060 + 192006061.

It is an arithmetic number, because the mean of its divisors is an integer number (192006061).

Almost surely, 2^384012121 is an apocalyptic number.

It is an amenable number.

384012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

384012121 is an equidigital number, since it uses as much as digits as its factorization.

384012121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 384012121 is about 19596.2272134204. The cubic root of 384012121 is about 726.8558847325.

The spelling of 384012121 in words is "three hundred eighty-four million, twelve thousand, one hundred twenty-one".