2123112113 has 4 divisors (see below), whose sum is σ = 2124650868. Its totient is φ = 2121573360.

The previous prime is 2123112091. The next prime is 2123112151. The reversal of 2123112113 is 3112113212.

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 485453089 + 1637659024 = 22033^2 + 40468^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123112113 - 2⁶ = 2123112049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123112091 and 2123112100.

It is not an unprimeable number, because it can be changed into a prime (2123112163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767306 + ... + 770067.

It is an arithmetic number, because the mean of its divisors is an integer number (531162717).

Almost surely, 2^2123112113 is an apocalyptic number.

It is an amenable number.

2123112113 is a deficient number, since it is larger than the sum of its proper divisors (1538755).

2123112113 is a wasteful number, since it uses less digits than its factorization.

2123112113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538754.

The product of its digits is 72, while the sum is 17.

The square root of 2123112113 is about 46077.2407268491. The cubic root of 2123112113 is about 1285.2599539689.

Adding to 2123112113 its reverse (3112113212), we get a palindrome (5235225325).

It can be divided in two parts, 212 and 3112113, that multiplied together give a palindrome (659767956).

The spelling of 2123112113 in words is "two billion, one hundred twenty-three million, one hundred twelve thousand, one hundred thirteen".