1111001009999 has 4 divisors (see below), whose sum is σ = 1111007957640. Its totient is φ = 1110994062360.

The previous prime is 1111001009891. The next prime is 1111001010017. The reversal of 1111001009999 is 9999001001111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111001009999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111001039999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3228164 + ... + 3555705.

It is an arithmetic number, because the mean of its divisors is an integer number (277751989410).

Almost surely, 2^{1111001009999} is an apocalyptic number.

1111001009999 is a deficient number, since it is larger than the sum of its proper divisors (6947641).

1111001009999 is an equidigital number, since it uses as much as digits as its factorization.

1111001009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6947640.

The product of its (nonzero) digits is 6561, while the sum is 41.

The spelling of 1111001009999 in words is "one trillion, one hundred eleven billion, one million, nine thousand, nine hundred ninety-nine".