11001111109999 has 2 divisors, whose sum is σ = 11001111110000. Its totient is φ = 11001111109998.

The previous prime is 11001111109969. The next prime is 11001111110021. The reversal of 11001111109999 is 99990111110011.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11001111109999 - 2²¹ = 11001109012847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11001111109969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500555554999 + 5500555555000.

It is an arithmetic number, because the mean of its divisors is an integer number (5500555555000).

Almost surely, 2^{11001111109999} is an apocalyptic number.

11001111109999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001111109999 is an equidigital number, since it uses as much as digits as its factorization.

11001111109999 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 11001111109999 in words is "eleven trillion, one billion, one hundred eleven million, one hundred nine thousand, nine hundred ninety-nine".