1118218111 has 2 divisors, whose sum is σ = 1118218112. Its totient is φ = 1118218110.

The previous prime is 1118218103. The next prime is 1118218169. The reversal of 1118218111 is 1118128111.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1118128111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1118218111 - 2³ = 1118218103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1118218411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559109055 + 559109056.

It is an arithmetic number, because the mean of its divisors is an integer number (559109056).

Almost surely, 2^1118218111 is an apocalyptic number.

1118218111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118218111 is an equidigital number, since it uses as much as digits as its factorization.

1118218111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128, while the sum is 25.

The square root of 1118218111 is about 33439.7684052985. The cubic root of 1118218111 is about 1037.9477870809.

Subtracting from 1118218111 its reverse (1118128111), we obtain a square (90000 = 300²).

The spelling of 1118218111 in words is "one billion, one hundred eighteen million, two hundred eighteen thousand, one hundred eleven".