2120111109 has 24 divisors (see below), whose sum is σ = 3157969152. Its totient is φ = 1369876320.

The previous prime is 2120111093. The next prime is 2120111153. The reversal of 2120111109 is 9011110212.

It is a happy number.

It is not a de Polignac number, because 2120111109 - 2⁴ = 2120111093 is a prime.

It is a super-2 number, since 2×2120111109² = 8989742229010419762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2120111091 and 2120111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120111309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19239 + ... + 67899.

It is an arithmetic number, because the mean of its divisors is an integer number (131582048).

Almost surely, 2^2120111109 is an apocalyptic number.

It is an amenable number.

2120111109 is a deficient number, since it is larger than the sum of its proper divisors (1037858043).

2120111109 is a wasteful number, since it uses less digits than its factorization.

2120111109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48817 (or 48814 counting only the distinct ones).

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

The square root of 2120111109 is about 46044.6642837148. The cubic root of 2120111109 is about 1284.6540997951.

The spelling of 2120111109 in words is "two billion, one hundred twenty million, one hundred eleven thousand, one hundred nine".