2100115212 has 48 divisors (see below), whose sum is σ = 5447457792. Its totient is φ = 625343040.

The previous prime is 2100115139. The next prime is 2100115231. The reversal of 2100115212 is 2125110012.

It is a junction number, because it is equal to n+sod(n) for n = 2100115191 and 2100115200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212298 + ... + 221969.

It is an arithmetic number, because the mean of its divisors is an integer number (113488704).

Almost surely, 2^2100115212 is an apocalyptic number.

It is an amenable number.

2100115212 is an abundant number, since it is smaller than the sum of its proper divisors (3347342580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2100115212 is a wasteful number, since it uses less digits than its factorization.

2100115212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434318 (or 434316 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 2100115212 is about 45827.0139982958. The cubic root of 2100115212 is about 1280.6025833032.

Adding to 2100115212 its reverse (2125110012), we get a palindrome (4225225224).

The spelling of 2100115212 in words is "two billion, one hundred million, one hundred fifteen thousand, two hundred twelve".