1111009999 has 16 divisors (see below), whose sum is σ = 1228548384. Its totient is φ = 996304000.

The previous prime is 1111009987. The next prime is 1111010003. The reversal of 1111009999 is 9999001111.

It is a cyclic number.

It is not a de Polignac number, because 1111009999 - 2¹³ = 1111001807 is a prime.

It is a Duffinian number.

1111009999 is a modest number, since divided by 9999 gives 1111 as remainder.

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 (1111009919) 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, 323817 + ... + 327229.

It is an arithmetic number, because the mean of its divisors is an integer number (76784274).

Almost surely, 2^1111009999 is an apocalyptic number.

1111009999 is a deficient number, since it is larger than the sum of its proper divisors (117538385).

1111009999 is a wasteful number, since it uses less digits than its factorization.

1111009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818.

The product of its (nonzero) digits is 6561, while the sum is 40.

The square root of 1111009999 is about 33331.8166171602. The cubic root of 1111009999 is about 1035.7127498144.

It can be divided in two parts, 111100 and 9999, that multiplied together give a square (1110888900 = 33330²).

The spelling of 1111009999 in words is "one billion, one hundred eleven million, nine thousand, nine hundred ninety-nine".