11011111001209 has 8 divisors (see below), whose sum is σ = 12128743628352. Its totient is φ = 9912915463440.

The previous prime is 11011111001173. The next prime is 11011111001213. The reversal of 11011111001209 is 90210011111011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11011111001209 - 2¹⁵ = 11011110968441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011111001269) 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, 4859271154 + ... + 4859273419.

It is an arithmetic number, because the mean of its divisors is an integer number (1516092953544).

Almost surely, 2^{11011111001209} is an apocalyptic number.

It is an amenable number.

11011111001209 is a deficient number, since it is larger than the sum of its proper divisors (1117632627143).

11011111001209 is a wasteful number, since it uses less digits than its factorization.

11011111001209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9718544687.

The product of its (nonzero) digits is 18, while the sum is 19.

The spelling of 11011111001209 in words is "eleven trillion, eleven billion, one hundred eleven million, one thousand, two hundred nine".