2123125115 has 4 divisors (see below), whose sum is σ = 2547750144. Its totient is φ = 1698500088.

The previous prime is 2123125091. The next prime is 2123125187. The reversal of 2123125115 is 5115213212.

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 2123125115 - 2⁸ = 2123124859 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212312507 + ... + 212312516.

It is an arithmetic number, because the mean of its divisors is an integer number (636937536).

Almost surely, 2^2123125115 is an apocalyptic number.

2123125115 is a deficient number, since it is larger than the sum of its proper divisors (424625029).

2123125115 is an equidigital number, since it uses as much as digits as its factorization.

2123125115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424625028.

The product of its digits is 600, while the sum is 23.

The square root of 2123125115 is about 46077.3818158107. The cubic root of 2123125115 is about 1285.2625776199.

Adding to 2123125115 its reverse (5115213212), we get a palindrome (7238338327).

The spelling of 2123125115 in words is "two billion, one hundred twenty-three million, one hundred twenty-five thousand, one hundred fifteen".