9999111011 has 16 divisors (see below), whose sum is σ = 10613030400. Its totient is φ = 9401293440.

The previous prime is 9999110993. The next prime is 9999111013. The reversal of 9999111011 is 1101119999.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9999111011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9999111011.

It is not an unprimeable number, because it can be changed into a prime (9999111013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366731 + ... + 393051.

It is an arithmetic number, because the mean of its divisors is an integer number (663314400).

Almost surely, 2^9999111011 is an apocalyptic number.

9999111011 is a deficient number, since it is larger than the sum of its proper divisors (613919389).

9999111011 is a wasteful number, since it uses less digits than its factorization.

9999111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26626.

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

The square root of 9999111011 is about 99995.5549562079. The cubic root of 9999111011 is about 2154.3708458486.

The spelling of 9999111011 in words is "nine billion, nine hundred ninety-nine million, one hundred eleven thousand, eleven".