9999011111111 has 32 divisors (see below), whose sum is σ = 11773024807680. Its totient is φ = 8391431488000.

The previous prime is 9999011111093. The next prime is 9999011111143. The reversal of 9999011111111 is 1111111109999.

It is a de Polignac number, because none of the positive numbers 2^k-9999011111111 is a prime.

9999011111111 is a modest number, since divided by 1111111 gives 999901 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999011117111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452981 + ... + 4494798.

It is an arithmetic number, because the mean of its divisors is an integer number (367907025240).

Almost surely, 2^{9999011111111} is an apocalyptic number.

9999011111111 is a deficient number, since it is larger than the sum of its proper divisors (1774013696569).

9999011111111 is a wasteful number, since it uses less digits than its factorization.

9999011111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4948015.

The product of its (nonzero) digits is 6561, while the sum is 44.

The spelling of 9999011111111 in words is "nine trillion, nine hundred ninety-nine billion, eleven million, one hundred eleven thousand, one hundred eleven".