990000111111 has 32 divisors (see below), whose sum is σ = 1442763083520. Its totient is φ = 598849785600.

The previous prime is 990000111091. The next prime is 990000111119. The reversal of 990000111111 is 111111000099.

It is not a de Polignac number, because 990000111111 - 2¹⁵ = 990000078343 is a prime.

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 (990000111119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47859691 + ... + 47880371.

It is an arithmetic number, because the mean of its divisors is an integer number (45086346360).

Almost surely, 2^990000111111 is an apocalyptic number.

990000111111 is a deficient number, since it is larger than the sum of its proper divisors (452762972409).

990000111111 is a wasteful number, since it uses less digits than its factorization.

990000111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23407.

The product of its (nonzero) digits is 81, while the sum is 24.

The spelling of 990000111111 in words is "nine hundred ninety billion, one hundred eleven thousand, one hundred eleven".