212105115 has 16 divisors (see below), whose sum is σ = 377076000. Its totient is φ = 113122656.

The previous prime is 212105083. The next prime is 212105123. The reversal of 212105115 is 511501212.

It is not a de Polignac number, because 212105115 - 2⁵ = 212105083 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 785440 + ... + 785709.

It is an arithmetic number, because the mean of its divisors is an integer number (23567250).

Almost surely, 2^212105115 is an apocalyptic number.

212105115 is a deficient number, since it is larger than the sum of its proper divisors (164970885).

212105115 is a wasteful number, since it uses less digits than its factorization.

212105115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571163 (or 1571157 counting only the distinct ones).

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

The square root of 212105115 is about 14563.8289951510. The cubic root of 212105115 is about 596.3717286373.

Adding to 212105115 its reverse (511501212), we get a palindrome (723606327).

The spelling of 212105115 in words is "two hundred twelve million, one hundred five thousand, one hundred fifteen".