1009100999989 has 2 divisors, whose sum is σ = 1009100999990. Its totient is φ = 1009100999988.

The previous prime is 1009100999981. The next prime is 1009101000043. The reversal of 1009100999989 is 9899990019001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 885659799025 + 123441200964 = 941095^2 + 351342^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009100999989 - 2³ = 1009100999981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1009100999989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1009100999981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504550499994 + 504550499995.

It is an arithmetic number, because the mean of its divisors is an integer number (504550499995).

Almost surely, 2^{1009100999989} is an apocalyptic number.

It is an amenable number.

1009100999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009100999989 is an equidigital number, since it uses as much as digits as its factorization.

1009100999989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4251528, while the sum is 64.

The spelling of 1009100999989 in words is "one trillion, nine billion, one hundred million, nine hundred ninety-nine thousand, nine hundred eighty-nine".