512224121 has 4 divisors (see below), whose sum is σ = 512318052. Its totient is φ = 512130192.

The previous prime is 512224061. The next prime is 512224217. The reversal of 512224121 is 121422215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121422215 = 5 ⋅24284443.

It can be written as a sum of positive squares in 2 ways, for example, as 422713600 + 89510521 = 20560^2 + 9461^2 .

It is a cyclic number.

It is not a de Polignac number, because 512224121 - 2¹⁸ = 511961977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 512224093 and 512224102.

It is not an unprimeable number, because it can be changed into a prime (512221121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38246 + ... + 49871.

It is an arithmetic number, because the mean of its divisors is an integer number (128079513).

Almost surely, 2^512224121 is an apocalyptic number.

It is an amenable number.

512224121 is a deficient number, since it is larger than the sum of its proper divisors (93931).

512224121 is an equidigital number, since it uses as much as digits as its factorization.

512224121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93930.

The product of its digits is 320, while the sum is 20.

The square root of 512224121 is about 22632.3688773403. The cubic root of 512224121 is about 800.1167126594.

Adding to 512224121 its reverse (121422215), we get a palindrome (633646336).

The spelling of 512224121 in words is "five hundred twelve million, two hundred twenty-four thousand, one hundred twenty-one".