1001111109975 has 36 divisors (see below), whose sum is σ = 1793207608816. Its totient is φ = 533894250240.

The previous prime is 1001111109967. The next prime is 1001111109989. The reversal of 1001111109975 is 5799011111001.

It is not a de Polignac number, because 1001111109975 - 2³ = 1001111109967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3948894 + ... + 4194756.

Almost surely, 2^{1001111109975} is an apocalyptic number.

1001111109975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1001111109975 is a deficient number, since it is larger than the sum of its proper divisors (792096498841).

1001111109975 is a wasteful number, since it uses less digits than its factorization.

1001111109975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263976 (or 263968 counting only the distinct ones).

The product of its (nonzero) digits is 2835, while the sum is 36.

The spelling of 1001111109975 in words is "one trillion, one billion, one hundred eleven million, one hundred nine thousand, nine hundred seventy-five".