2124512123 has 4 divisors (see below), whose sum is σ = 2133327768. Its totient is φ = 2115696480.

The previous prime is 2124512101. The next prime is 2124512153. The reversal of 2124512123 is 3212154212.

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 2124512123 - 2¹⁸ = 2124249979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2124512153) 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, 4407461 + ... + 4407942.

It is an arithmetic number, because the mean of its divisors is an integer number (533331942).

Almost surely, 2^2124512123 is an apocalyptic number.

2124512123 is a deficient number, since it is larger than the sum of its proper divisors (8815645).

2124512123 is an equidigital number, since it uses as much as digits as its factorization.

2124512123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8815644.

The product of its digits is 960, while the sum is 23.

The square root of 2124512123 is about 46092.4302136479. The cubic root of 2124512123 is about 1285.5423980613.

Adding to 2124512123 its reverse (3212154212), we get a palindrome (5336666335).

The spelling of 2124512123 in words is "two billion, one hundred twenty-four million, five hundred twelve thousand, one hundred twenty-three".