2123145223 has 4 divisors (see below), whose sum is σ = 2129843160. Its totient is φ = 2116447288.

The previous prime is 2123145217. The next prime is 2123145251. The reversal of 2123145223 is 3225413212.

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 2123145223 - 2⁵ = 2123145191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123145293) 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, 3348493 + ... + 3349126.

It is an arithmetic number, because the mean of its divisors is an integer number (532460790).

Almost surely, 2^2123145223 is an apocalyptic number.

2123145223 is a deficient number, since it is larger than the sum of its proper divisors (6697937).

2123145223 is an equidigital number, since it uses as much as digits as its factorization.

2123145223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6697936.

The product of its digits is 2880, while the sum is 25.

The square root of 2123145223 is about 46077.6000134556. The cubic root of 2123145223 is about 1285.2666351572.

Adding to 2123145223 its reverse (3225413212), we get a palindrome (5348558435).

The spelling of 2123145223 in words is "two billion, one hundred twenty-three million, one hundred forty-five thousand, two hundred twenty-three".