2211113123 has 4 divisors (see below), whose sum is σ = 2211212640. Its totient is φ = 2211013608.

The previous prime is 2211113117. The next prime is 2211113131. The reversal of 2211113123 is 3213111122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2211113123 - 2²⁰ = 2210064547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211113153) 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, 473 + ... + 66501.

It is an arithmetic number, because the mean of its divisors is an integer number (552803160).

Almost surely, 2^2211113123 is an apocalyptic number.

2211113123 is a deficient number, since it is larger than the sum of its proper divisors (99517).

2211113123 is an equidigital number, since it uses as much as digits as its factorization.

2211113123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99516.

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

The square root of 2211113123 is about 47022.4746584014. The cubic root of 2211113123 is about 1302.7777140741. Note that the first 4 decimals are identical.

Adding to 2211113123 its reverse (3213111122), we get a palindrome (5424224245).

The spelling of 2211113123 in words is "two billion, two hundred eleven million, one hundred thirteen thousand, one hundred twenty-three".