2113123 has 4 divisors (see below), whose sum is σ = 2224360. Its totient is φ = 2001888.

The previous prime is 2113109. The next prime is 2113129. The reversal of 2113123 is 3213112.

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

It is a cyclic number.

It is not a de Polignac number, because 2113123 - 2⁵ = 2113091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2113129) 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, 55590 + ... + 55627.

It is an arithmetic number, because the mean of its divisors is an integer number (556090).

2^2113123 is an apocalyptic number.

2113123 is a deficient number, since it is larger than the sum of its proper divisors (111237).

2113123 is a wasteful number, since it uses less digits than its factorization.

2113123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111236.

The product of its digits is 36, while the sum is 13.

The square root of 2113123 is about 1453.6584880913. The cubic root of 2113123 is about 128.3241094549.

Adding to 2113123 its reverse (3213112), we get a palindrome (5326235).

The spelling of 2113123 in words is "two million, one hundred thirteen thousand, one hundred twenty-three".