11121120009 has 24 divisors (see below), whose sum is σ = 16574163840. Its totient is φ = 7182088992.

The previous prime is 11121119987. The next prime is 11121120041. The reversal of 11121120009 is 90002112111.

It is a happy number.

It is not a de Polignac number, because 11121120009 - 2¹¹ = 11121117961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121119973 and 11121120000.

It is not an unprimeable number, because it can be changed into a prime (11121120509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109879 + ... + 185244.

It is an arithmetic number, because the mean of its divisors is an integer number (690590160).

Almost surely, 2^11121120009 is an apocalyptic number.

It is an amenable number.

11121120009 is a deficient number, since it is larger than the sum of its proper divisors (5453043831).

11121120009 is a wasteful number, since it uses less digits than its factorization.

11121120009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295261 (or 295258 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 11121120009 in words is "eleven billion, one hundred twenty-one million, one hundred twenty thousand, nine".