2111112009 has 6 divisors (see below), whose sum is σ = 3049384026. Its totient is φ = 1407408000.

The previous prime is 2111112007. The next prime is 2111112079. The reversal of 2111112009 is 9002111112.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1563411600 + 547700409 = 39540^2 + 23403^2 .

It is not a de Polignac number, because 2111112009 - 2¹ = 2111112007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2111111982 and 2111112000.

It is not an unprimeable number, because it can be changed into a prime (2111112001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117283992 + ... + 117284009.

It is an arithmetic number, because the mean of its divisors is an integer number (508230671).

Almost surely, 2^2111112009 is an apocalyptic number.

It is an amenable number.

2111112009 is a deficient number, since it is larger than the sum of its proper divisors (938272017).

2111112009 is a wasteful number, since it uses less digits than its factorization.

2111112009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234568007 (or 234568004 counting only the distinct ones).

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

The square root of 2111112009 is about 45946.8389445890. The cubic root of 2111112009 is about 1282.8338922954.

The spelling of 2111112009 in words is "two billion, one hundred eleven million, one hundred twelve thousand, nine".