2113111311123 has 4 divisors (see below), whose sum is σ = 2817481748168. Its totient is φ = 1408740874080.

The previous prime is 2113111311089. The next prime is 2113111311127. The reversal of 2113111311123 is 3211131113112.

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

It is not a de Polignac number, because 2113111311123 - 2¹⁴ = 2113111294739 is a prime.

It is a super-2 number, since 2×2113111311123² (a number of 25 digits) contains 22 as substring.

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 2113111311123.

It is not an unprimeable number, because it can be changed into a prime (2113111311127) 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, 352185218518 + ... + 352185218523.

It is an arithmetic number, because the mean of its divisors is an integer number (704370437042).

Almost surely, 2^{2113111311123} is an apocalyptic number.

2113111311123 is a deficient number, since it is larger than the sum of its proper divisors (704370437045).

2113111311123 is an equidigital number, since it uses as much as digits as its factorization.

2113111311123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704370437044.

The product of its digits is 108, while the sum is 21.

Adding to 2113111311123 its reverse (3211131113112), we get a palindrome (5324242424235).

The spelling of 2113111311123 in words is "two trillion, one hundred thirteen billion, one hundred eleven million, three hundred eleven thousand, one hundred twenty-three".