2120111113 has 4 divisors (see below), whose sum is σ = 2120486148. Its totient is φ = 2119736080.

The previous prime is 2120111093. The next prime is 2120111153. The reversal of 2120111113 is 3111110212.

It is a happy number.

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 1578711289 + 541399824 = 39733^2 + 23268^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120111113 - 2¹⁷ = 2119980041 is a prime.

It is a super-2 number, since 2×2120111113² = 8989742262932197538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120111093 and 2120111102.

It is not an unprimeable number, because it can be changed into a prime (2120111153) 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, 178906 + ... + 190387.

It is an arithmetic number, because the mean of its divisors is an integer number (530121537).

Almost surely, 2^2120111113 is an apocalyptic number.

It is an amenable number.

2120111113 is a deficient number, since it is larger than the sum of its proper divisors (375035).

2120111113 is an equidigital number, since it uses as much as digits as its factorization.

2120111113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375034.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 2120111113 is about 46044.6643271509. The cubic root of 2120111113 is about 1284.6541006030.

Adding to 2120111113 its reverse (3111110212), we get a palindrome (5231221325).

Subtracting 2120111113 from its reverse (3111110212), we obtain a palindrome (990999099).

The spelling of 2120111113 in words is "two billion, one hundred twenty million, one hundred eleven thousand, one hundred thirteen".