255016121 has 2 divisors, whose sum is σ = 255016122. Its totient is φ = 255016120.

The previous prime is 255016117. The next prime is 255016123. The reversal of 255016121 is 121610552.

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., 192210496 + 62805625 = 13864^2 + 7925^2 .

It is a cyclic number.

It is not a de Polignac number, because 255016121 - 2² = 255016117 is a prime.

Together with 255016123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255016123) 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, 127508060 + 127508061.

It is an arithmetic number, because the mean of its divisors is an integer number (127508061).

Almost surely, 2^255016121 is an apocalyptic number.

It is an amenable number.

255016121 is a deficient number, since it is larger than the sum of its proper divisors (1).

255016121 is an equidigital number, since it uses as much as digits as its factorization.

255016121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 255016121 is about 15969.2241827836. The cubic root of 255016121 is about 634.1459334610.

Adding to 255016121 its reverse (121610552), we get a palindrome (376626673).

The spelling of 255016121 in words is "two hundred fifty-five million, sixteen thousand, one hundred twenty-one".