11111110999999 has 2 divisors, whose sum is σ = 11111111000000. Its totient is φ = 11111110999998.

The previous prime is 11111110999981. The next prime is 11111111000047. The reversal of 11111110999999 is 99999901111111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111110999999 - 2¹⁹ = 11111110475711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111110999949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555555499999 + 5555555500000.

It is an arithmetic number, because the mean of its divisors is an integer number (5555555500000).

Almost surely, 2^{11111110999999} is an apocalyptic number.

11111110999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111110999999 is an equidigital number, since it uses as much as digits as its factorization.

11111110999999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 531441, while the sum is 61.

The spelling of 11111110999999 in words is "eleven trillion, one hundred eleven billion, one hundred ten million, nine hundred ninety-nine thousand, nine hundred ninety-nine".