1011109998 has 64 divisors (see below), whose sum is σ = 2173628160. Its totient is φ = 312947712.

The previous prime is 1011109997. The next prime is 1011110011. The reversal of 1011109998 is 8999011101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011109993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 500286 + ... + 502302.

It is an arithmetic number, because the mean of its divisors is an integer number (33962940).

Almost surely, 2^1011109998 is an apocalyptic number.

1011109998 is an abundant number, since it is smaller than the sum of its proper divisors (1162518162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011109998 is a wasteful number, since it uses less digits than its factorization.

1011109998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161.

The product of its (nonzero) digits is 5832, while the sum is 39.

The square root of 1011109998 is about 31797.9558776975. The cubic root of 1011109998 is about 1003.6897020219.

The spelling of 1011109998 in words is "one billion, eleven million, one hundred nine thousand, nine hundred ninety-eight".