10011111099991 has 2 divisors, whose sum is σ = 10011111099992. Its totient is φ = 10011111099990.

The previous prime is 10011111099947. The next prime is 10011111100091. The reversal of 10011111099991 is 19999011111001.

It is a happy number.

10011111099991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10011111099991 - 2¹³ = 10011111091799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10011111099911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005555549995 + 5005555549996.

It is an arithmetic number, because the mean of its divisors is an integer number (5005555549996).

Almost surely, 2^{10011111099991} is an apocalyptic number.

10011111099991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10011111099991 is an equidigital number, since it uses as much as digits as its factorization.

10011111099991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6561, while the sum is 43.

The spelling of 10011111099991 in words is "ten trillion, eleven billion, one hundred eleven million, ninety-nine thousand, nine hundred ninety-one".