111121120009 has 4 divisors (see below), whose sum is σ = 112221329220. Its totient is φ = 110020910800.

The previous prime is 111121120001. The next prime is 111121120051. The reversal of 111121120009 is 900021121111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81226710009 + 29894410000 = 285003^2 + 172900^2 .

It is a cyclic number.

It is not a de Polignac number, because 111121120009 - 2³ = 111121120001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111121120001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550104454 + ... + 550104655.

It is an arithmetic number, because the mean of its divisors is an integer number (28055332305).

Almost surely, 2^111121120009 is an apocalyptic number.

It is an amenable number.

111121120009 is a deficient number, since it is larger than the sum of its proper divisors (1100209211).

111121120009 is a wasteful number, since it uses less digits than its factorization.

111121120009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100209210.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 111121120009 in words is "one hundred eleven billion, one hundred twenty-one million, one hundred twenty thousand, nine".