111122121209 has 8 divisors (see below), whose sum is σ = 121340818560. Its totient is φ = 100922871600.

The previous prime is 111122121169. The next prime is 111122121221. The reversal of 111122121209 is 902121221111.

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 a de Polignac number, because none of the positive numbers 2^k-111122121209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111122121269) 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, 4849982 + ... + 4872839.

It is an arithmetic number, because the mean of its divisors is an integer number (15167602320).

Almost surely, 2^111122121209 is an apocalyptic number.

It is an amenable number.

111122121209 is a deficient number, since it is larger than the sum of its proper divisors (10218697351).

111122121209 is a wasteful number, since it uses less digits than its factorization.

111122121209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9723871.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 111122121209 in words is "one hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred nine".