2120011109 has 4 divisors (see below), whose sum is σ = 2141001420. Its totient is φ = 2099020800.

The previous prime is 2120011097. The next prime is 2120011111. The reversal of 2120011109 is 9011100212.

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 2063430625 + 56580484 = 45425^2 + 7522^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120011109 - 2⁸ = 2120010853 is a prime.

It is a super-3 number, since 3×2120011109³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120011709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10495004 + ... + 10495205.

It is an arithmetic number, because the mean of its divisors is an integer number (535250355).

Almost surely, 2^2120011109 is an apocalyptic number.

It is an amenable number.

2120011109 is a deficient number, since it is larger than the sum of its proper divisors (20990311).

2120011109 is a wasteful number, since it uses less digits than its factorization.

2120011109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20990310.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 2120011109 is about 46043.5783687584. The cubic root of 2120011109 is about 1284.6339015722.

The spelling of 2120011109 in words is "two billion, one hundred twenty million, eleven thousand, one hundred nine".