9999990011111 has 4 divisors (see below), whose sum is σ = 9999999104232. Its totient is φ = 9999980917992.

The previous prime is 9999990011087. The next prime is 9999990011147. The reversal of 9999990011111 is 1111100999999.

9999990011111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9999990011111 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999990016111) 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, 2626745 + ... + 5186498.

It is an arithmetic number, because the mean of its divisors is an integer number (2499999776058).

Almost surely, 2^{9999990011111} is an apocalyptic number.

9999990011111 is a deficient number, since it is larger than the sum of its proper divisors (9093121).

9999990011111 is a wasteful number, since it uses less digits than its factorization.

9999990011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9093120.

The product of its (nonzero) digits is 531441, while the sum is 59.

The spelling of 9999990011111 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred ninety million, eleven thousand, one hundred eleven".