1001099999999 has 6 divisors (see below), whose sum is σ = 1100382644760. Its totient is φ = 910090908980.

The previous prime is 1001099999987. The next prime is 1001100000001. The reversal of 1001099999999 is 9999999901001.

It is not a de Polignac number, because 1001099999999 - 2⁴ = 1001099999983 is a prime.

It is a Duffinian number.

1001099999999 is a modest number, since divided by 9999999 gives 100109 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001099999099) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4136776739 + ... + 4136776980.

It is an arithmetic number, because the mean of its divisors is an integer number (183397107460).

Almost surely, 2^{1001099999999} is an apocalyptic number.

1001099999999 is a deficient number, since it is larger than the sum of its proper divisors (99282644761).

1001099999999 is an equidigital number, since it uses as much as digits as its factorization.

1001099999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8273553741 (or 8273553730 counting only the distinct ones).

The product of its (nonzero) digits is 43046721, while the sum is 74.

The spelling of 1001099999999 in words is "one trillion, one billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".