321185077816873 has 2 divisors, whose sum is σ = 321185077816874. Its totient is φ = 321185077816872.

The previous prime is 321185077816871. The next prime is 321185077816913. The reversal of 321185077816873 is 378618770581123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219954052399104 + 101231025417769 = 14830848^2 + 10061363^2 .

It is a cyclic number.

It is not a de Polignac number, because 321185077816873 - 2¹ = 321185077816871 is a prime.

Together with 321185077816871, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 321185077816799 and 321185077816808.

It is not a weakly prime, because it can be changed into another prime (321185077816871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160592538908436 + 160592538908437.

It is an arithmetic number, because the mean of its divisors is an integer number (160592538908437).

Almost surely, 2^{321185077816873} is an apocalyptic number.

It is an amenable number.

321185077816873 is a deficient number, since it is larger than the sum of its proper divisors (1).

321185077816873 is an equidigital number, since it uses as much as digits as its factorization.

321185077816873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94832640, while the sum is 67.

The spelling of 321185077816873 in words is "three hundred twenty-one trillion, one hundred eighty-five billion, seventy-seven million, eight hundred sixteen thousand, eight hundred seventy-three".