2112311013123 has 4 divisors (see below), whose sum is σ = 2816414684168. Its totient is φ = 1408207342080.

The previous prime is 2112311013103. The next prime is 2112311013139. The reversal of 2112311013123 is 3213101132112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2112311013123 - 2⁵ = 2112311013091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112311013123.

It is not an unprimeable number, because it can be changed into a prime (2112311013103) 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 in 3 ways as a sum of consecutive naturals, for example, 352051835518 + ... + 352051835523.

It is an arithmetic number, because the mean of its divisors is an integer number (704103671042).

Almost surely, 2^{2112311013123} is an apocalyptic number.

2112311013123 is a deficient number, since it is larger than the sum of its proper divisors (704103671045).

2112311013123 is an equidigital number, since it uses as much as digits as its factorization.

2112311013123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704103671044.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 2112311013123 its reverse (3213101132112), we get a palindrome (5325412145235).

The spelling of 2112311013123 in words is "two trillion, one hundred twelve billion, three hundred eleven million, thirteen thousand, one hundred twenty-three".