1118998111 has 32 divisors (see below), whose sum is σ = 1417747968. Its totient is φ = 857917440.

The previous prime is 1118998109. The next prime is 1118998121.

1118998111 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1118998111 - 2¹ = 1118998109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118998121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1739956 + ... + 1740598.

It is an arithmetic number, because the mean of its divisors is an integer number (44304624).

Almost surely, 2^1118998111 is an apocalyptic number.

1118998111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1118998111 is a deficient number, since it is larger than the sum of its proper divisors (298749857).

1118998111 is a wasteful number, since it uses less digits than its factorization.

1118998111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its digits is 5184, while the sum is 40.

The square root of 1118998111 is about 33451.4291324003. The cubic root of 1118998111 is about 1038.1890671129.

The spelling of 1118998111 in words is "one billion, one hundred eighteen million, nine hundred ninety-eight thousand, one hundred eleven".