990011011111011 has 8 divisors (see below), whose sum is σ = 1466682979423760. Its totient is φ = 660007340740656.

The previous prime is 990011011110997. The next prime is 990011011111147. The reversal of 990011011111011 is 110111110110099.

It is not a de Polignac number, because 990011011111011 - 2¹⁰ = 990011011109987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 36667074485593 = 990011011111011 / (9 + 9 + 0 + 0 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990011011113011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18333537242770 + ... + 18333537242823.

It is an arithmetic number, because the mean of its divisors is an integer number (183335372427970).

Almost surely, 2^{990011011111011} is an apocalyptic number.

990011011111011 is a deficient number, since it is larger than the sum of its proper divisors (476671968312749).

990011011111011 is a wasteful number, since it uses less digits than its factorization.

990011011111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36667074485602 (or 36667074485596 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 27.

The spelling of 990011011111011 in words is "nine hundred ninety trillion, eleven billion, eleven million, one hundred eleven thousand, eleven".