10001111009999 has 4 divisors (see below), whose sum is σ = 10589411657664. Its totient is φ = 9412810362336.

The previous prime is 10001111009993. The next prime is 10001111010131. The reversal of 10001111009999 is 99990011110001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 10001111009999 - 2⁴⁰ = 8901599382223 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 (10001111009993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294150323807 + ... + 294150323840.

It is an arithmetic number, because the mean of its divisors is an integer number (2647352914416).

Almost surely, 2^{10001111009999} is an apocalyptic number.

10001111009999 is a deficient number, since it is larger than the sum of its proper divisors (588300647665).

10001111009999 is an equidigital number, since it uses as much as digits as its factorization.

10001111009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588300647664.

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

The spelling of 10001111009999 in words is "ten trillion, one billion, one hundred eleven million, nine thousand, nine hundred ninety-nine".