102771866209 has 2 divisors, whose sum is σ = 102771866210. Its totient is φ = 102771866208.

The previous prime is 102771866201. The next prime is 102771866231. The reversal of 102771866209 is 902668177201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98178822225 + 4593043984 = 313335^2 + 67772^2 .

It is a cyclic number.

It is not a de Polignac number, because 102771866209 - 2³ = 102771866201 is a prime.

It is not a weakly prime, because it can be changed into another prime (102771866201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51385933104 + 51385933105.

It is an arithmetic number, because the mean of its divisors is an integer number (51385933105).

Almost surely, 2^102771866209 is an apocalyptic number.

It is an amenable number.

102771866209 is a deficient number, since it is larger than the sum of its proper divisors (1).

102771866209 is an equidigital number, since it uses as much as digits as its factorization.

102771866209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 102771866209 in words is "one hundred two billion, seven hundred seventy-one million, eight hundred sixty-six thousand, two hundred nine".