2121112112113 has 2 divisors, whose sum is σ = 2121112112114. Its totient is φ = 2121112112112.

The previous prime is 2121112112083. The next prime is 2121112112179. The reversal of 2121112112113 is 3112112111212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2100957483024 + 20154629089 = 1449468^2 + 141967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121112112113 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121112112183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060556056056 + 1060556056057.

It is an arithmetic number, because the mean of its divisors is an integer number (1060556056057).

Almost surely, 2^{2121112112113} is an apocalyptic number.

It is an amenable number.

2121112112113 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121112112113 is an equidigital number, since it uses as much as digits as its factorization.

2121112112113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 19.

Adding to 2121112112113 its reverse (3112112111212), we get a palindrome (5233224223325).

Subtracting 2121112112113 from its reverse (3112112111212), we obtain a palindrome (990999999099).

The spelling of 2121112112113 in words is "two trillion, one hundred twenty-one billion, one hundred twelve million, one hundred twelve thousand, one hundred thirteen".