2101166983609 has 2 divisors, whose sum is σ = 2101166983610. Its totient is φ = 2101166983608.

The previous prime is 2101166983583. The next prime is 2101166983631. The reversal of 2101166983609 is 9063896611012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1975298135209 + 125868848400 = 1405453^2 + 354780^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101166983609 - 2⁷ = 2101166983481 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101166983009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050583491804 + 1050583491805.

It is an arithmetic number, because the mean of its divisors is an integer number (1050583491805).

Almost surely, 2^{2101166983609} is an apocalyptic number.

It is an amenable number.

2101166983609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101166983609 is an equidigital number, since it uses as much as digits as its factorization.

2101166983609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 2101166983609 in words is "two trillion, one hundred one billion, one hundred sixty-six million, nine hundred eighty-three thousand, six hundred nine".