2100125115 has 24 divisors (see below), whose sum is σ = 3971146608. Its totient is φ = 1018242240.

The previous prime is 2100125113. The next prime is 2100125123. The reversal of 2100125115 is 5115210012.

It is not a de Polignac number, because 2100125115 - 2¹ = 2100125113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100125113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2120844 + ... + 2121833.

It is an arithmetic number, because the mean of its divisors is an integer number (165464442).

Almost surely, 2^2100125115 is an apocalyptic number.

2100125115 is a deficient number, since it is larger than the sum of its proper divisors (1871021493).

2100125115 is a wasteful number, since it uses less digits than its factorization.

2100125115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242699 (or 4242696 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 2100125115 is about 45827.1220457929. The cubic root of 2100125115 is about 1280.6045961749.

Adding to 2100125115 its reverse (5115210012), we get a palindrome (7215335127).

The spelling of 2100125115 in words is "two billion, one hundred million, one hundred twenty-five thousand, one hundred fifteen".