511650121 has 2 divisors, whose sum is σ = 511650122. Its totient is φ = 511650120.

The previous prime is 511650109. The next prime is 511650137. The reversal of 511650121 is 121056115.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284394496 + 227255625 = 16864^2 + 15075^2 .

It is a cyclic number.

It is not a de Polignac number, because 511650121 - 2¹³ = 511641929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 511650092 and 511650101.

It is not a weakly prime, because it can be changed into another prime (511650151) 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, 255825060 + 255825061.

It is an arithmetic number, because the mean of its divisors is an integer number (255825061).

Almost surely, 2^511650121 is an apocalyptic number.

It is an amenable number.

511650121 is a deficient number, since it is larger than the sum of its proper divisors (1).

511650121 is an equidigital number, since it uses as much as digits as its factorization.

511650121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 511650121 is about 22619.6843700349. The cubic root of 511650121 is about 799.8177298293.

The spelling of 511650121 in words is "five hundred eleven million, six hundred fifty thousand, one hundred twenty-one".