102002211005209 has 2 divisors, whose sum is σ = 102002211005210. Its totient is φ = 102002211005208.

The previous prime is 102002211005207. The next prime is 102002211005263. The reversal of 102002211005209 is 902500112200201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94450311288025 + 7551899717184 = 9718555^2 + 2748072^2 .

It is a cyclic number.

It is not a de Polignac number, because 102002211005209 - 2¹ = 102002211005207 is a prime.

Together with 102002211005207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (102002211005207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51001105502604 + 51001105502605.

It is an arithmetic number, because the mean of its divisors is an integer number (51001105502605).

Almost surely, 2^{102002211005209} is an apocalyptic number.

It is an amenable number.

102002211005209 is a deficient number, since it is larger than the sum of its proper divisors (1).

102002211005209 is an equidigital number, since it uses as much as digits as its factorization.

102002211005209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 102002211005209 in words is "one hundred two trillion, two billion, two hundred eleven million, five thousand, two hundred nine".