10111009999991 has 2 divisors, whose sum is σ = 10111009999992. Its totient is φ = 10111009999990.

The previous prime is 10111009999949. The next prime is 10111009999999. The reversal of 10111009999991 is 19999990011101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10111009999991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10111009999991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111009999999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055504999995 + 5055504999996.

It is an arithmetic number, because the mean of its divisors is an integer number (5055504999996).

Almost surely, 2^{10111009999991} is an apocalyptic number.

10111009999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111009999991 is an equidigital number, since it uses as much as digits as its factorization.

10111009999991 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 10111009999991 in words is "ten trillion, one hundred eleven billion, nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".