512236121081 has 2 divisors, whose sum is σ = 512236121082. Its totient is φ = 512236121080.

The previous prime is 512236121011. The next prime is 512236121083. The reversal of 512236121081 is 180121632215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434952121081 + 77284000000 = 659509^2 + 278000^2 .

It is a cyclic number.

It is not a de Polignac number, because 512236121081 - 2²⁶ = 512169012217 is a prime.

It is a super-2 number, since 2×512236121081² (a number of 24 digits) contains 22 as substring.

Together with 512236121083, 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 (512236121083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256118060540 + 256118060541.

It is an arithmetic number, because the mean of its divisors is an integer number (256118060541).

Almost surely, 2^512236121081 is an apocalyptic number.

It is an amenable number.

512236121081 is a deficient number, since it is larger than the sum of its proper divisors (1).

512236121081 is an equidigital number, since it uses as much as digits as its factorization.

512236121081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

Adding to 512236121081 its reverse (180121632215), we get a palindrome (692357753296).

The spelling of 512236121081 in words is "five hundred twelve billion, two hundred thirty-six million, one hundred twenty-one thousand, eighty-one".