11100009999 has 16 divisors (see below), whose sum is σ = 16162965504. Its totient is φ = 6734565600.

The previous prime is 11100009979. The next prime is 11100010087. The reversal of 11100009999 is 99990000111.

It is not a de Polignac number, because 11100009999 - 2¹⁹ = 11099485711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

11100009999 is a modest number, since divided by 9999 gives 111 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 (11100009929) 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, 2001567 + ... + 2007104.

It is an arithmetic number, because the mean of its divisors is an integer number (1010185344).

Almost surely, 2^11100009999 is an apocalyptic number.

11100009999 is a deficient number, since it is larger than the sum of its proper divisors (5062955505).

11100009999 is a wasteful number, since it uses less digits than its factorization.

11100009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4008758.

The product of its (nonzero) digits is 6561, while the sum is 39.

The spelling of 11100009999 in words is "eleven billion, one hundred million, nine thousand, nine hundred ninety-nine".