2118111311111 has 2 divisors, whose sum is σ = 2118111311112. Its totient is φ = 2118111311110.

The previous prime is 2118111311093. The next prime is 2118111311159. The reversal of 2118111311111 is 1111131118112.

It is a m-pointer prime, because the next prime (2118111311159) can be obtained adding 2118111311111 to its product of digits (48).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2118111311111 - 2¹⁰ = 2118111310087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118111311171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059055655555 + 1059055655556.

It is an arithmetic number, because the mean of its divisors is an integer number (1059055655556).

Almost surely, 2^{2118111311111} is an apocalyptic number.

2118111311111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118111311111 is an equidigital number, since it uses as much as digits as its factorization.

2118111311111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 23.

Adding to 2118111311111 its reverse (1111131118112), we get a palindrome (3229242429223).

The spelling of 2118111311111 in words is "two trillion, one hundred eighteen billion, one hundred eleven million, three hundred eleven thousand, one hundred eleven".