1011112001998 has 16 divisors (see below), whose sum is σ = 1733820338304. Its totient is φ = 433212345720.

The previous prime is 1011112001953. The next prime is 1011112002011. The reversal of 1011112001998 is 8991002111101.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10062340 + ... + 10162327.

It is an arithmetic number, because the mean of its divisors is an integer number (108363771144).

Almost surely, 2^{1011112001998} is an apocalyptic number.

1011112001998 is a deficient number, since it is larger than the sum of its proper divisors (722708336306).

1011112001998 is a wasteful number, since it uses less digits than its factorization.

1011112001998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20228247.

The product of its (nonzero) digits is 1296, while the sum is 34.

The spelling of 1011112001998 in words is "one trillion, eleven billion, one hundred twelve million, one thousand, nine hundred ninety-eight".