111101109992909 has 2 divisors, whose sum is σ = 111101109992910. Its totient is φ = 111101109992908.

The previous prime is 111101109992897. The next prime is 111101109992941. The reversal of 111101109992909 is 909299901101111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104200916173225 + 6900193819684 = 10207885^2 + 2626822^2 .

It is a cyclic number.

It is not a de Polignac number, because 111101109992909 - 2²⁰ = 111101108944333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111101109992309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550554996454 + 55550554996455.

It is an arithmetic number, because the mean of its divisors is an integer number (55550554996455).

Almost surely, 2^{111101109992909} is an apocalyptic number.

It is an amenable number.

111101109992909 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101109992909 is an equidigital number, since it uses as much as digits as its factorization.

111101109992909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098, while the sum is 53.

The spelling of 111101109992909 in words is "one hundred eleven trillion, one hundred one billion, one hundred nine million, nine hundred ninety-two thousand, nine hundred nine".