11101121121209 has 32 divisors (see below), whose sum is σ = 13690755302400. Its totient is φ = 8785509350400.

The previous prime is 11101121121203. The next prime is 11101121121221. The reversal of 11101121121209 is 90212112110111.

It is a cyclic number.

It is not a de Polignac number, because 11101121121209 - 2⁴ = 11101121121193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11101121121203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2926769 + ... + 5546910.

It is an arithmetic number, because the mean of its divisors is an integer number (427836103200).

Almost surely, 2^{11101121121209} is an apocalyptic number.

It is an amenable number.

11101121121209 is a deficient number, since it is larger than the sum of its proper divisors (2589634181191).

11101121121209 is a wasteful number, since it uses less digits than its factorization.

11101121121209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8473913.

The product of its (nonzero) digits is 72, while the sum is 23.

The spelling of 11101121121209 in words is "eleven trillion, one hundred one billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred nine".