10111109999909 has 2 divisors, whose sum is σ = 10111109999910. Its totient is φ = 10111109999908.

The previous prime is 10111109999897. The next prime is 10111110000059. The reversal of 10111109999909 is 90999990111101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9149233552900 + 961876447009 = 3024770^2 + 980753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10111109999909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111109998909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055554999954 + 5055554999955.

It is an arithmetic number, because the mean of its divisors is an integer number (5055554999955).

Almost surely, 2^{10111109999909} is an apocalyptic number.

It is an amenable number.

10111109999909 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111109999909 is an equidigital number, since it uses as much as digits as its factorization.

10111109999909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 531441, while the sum is 59.

The spelling of 10111109999909 in words is "ten trillion, one hundred eleven billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred nine".