102005911321 has 2 divisors, whose sum is σ = 102005911322. Its totient is φ = 102005911320.

The previous prime is 102005911313. The next prime is 102005911379. The reversal of 102005911321 is 123119500201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96077681296 + 5928230025 = 309964^2 + 76995^2 .

It is an emirp because it is prime and its reverse (123119500201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102005911321 - 2³ = 102005911313 is a prime.

It is not a weakly prime, because it can be changed into another prime (102005911391) 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, 51002955660 + 51002955661.

It is an arithmetic number, because the mean of its divisors is an integer number (51002955661).

Almost surely, 2^102005911321 is an apocalyptic number.

It is an amenable number.

102005911321 is a deficient number, since it is larger than the sum of its proper divisors (1).

102005911321 is an equidigital number, since it uses as much as digits as its factorization.

102005911321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 25.

The spelling of 102005911321 in words is "one hundred two billion, five million, nine hundred eleven thousand, three hundred twenty-one".