11123112009 has 8 divisors (see below), whose sum is σ = 14862575520. Its totient is φ = 7399528256.

The previous prime is 11123111977. The next prime is 11123112017. The reversal of 11123112009 is 90021132111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11123112009 - 2⁵ = 11123111977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11123112029) 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, 3968304 + ... + 3971105.

It is an arithmetic number, because the mean of its divisors is an integer number (1857821940).

Almost surely, 2^11123112009 is an apocalyptic number.

It is an amenable number.

11123112009 is a deficient number, since it is larger than the sum of its proper divisors (3739463511).

11123112009 is an equidigital number, since it uses as much as digits as its factorization.

11123112009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7939879.

The product of its (nonzero) digits is 108, while the sum is 21.

The spelling of 11123112009 in words is "eleven billion, one hundred twenty-three million, one hundred twelve thousand, nine".