212025105 has 24 divisors (see below), whose sum is σ = 389129832. Its totient is φ = 106427904.

The previous prime is 212025091. The next prime is 212025127. The reversal of 212025105 is 501520212.

212025105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 39050001 + 172975104 = 6249^2 + 13152^2 .

It is not a de Polignac number, because 212025105 - 2⁷ = 212024977 is a prime.

It is a super-2 number, since 2×212025105² = 89909290300522050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137814 + ... + 139343.

It is an arithmetic number, because the mean of its divisors is an integer number (16213743).

Almost surely, 2^212025105 is an apocalyptic number.

It is an amenable number.

212025105 is a deficient number, since it is larger than the sum of its proper divisors (177104727).

212025105 is a wasteful number, since it uses less digits than its factorization.

212025105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277185 (or 277182 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 212025105 is about 14561.0818622793. The cubic root of 212025105 is about 596.2967316985.

Adding to 212025105 its reverse (501520212), we get a palindrome (713545317).

It can be divided in two parts, 2120 and 25105, that added together give a square (27225 = 165²).

The spelling of 212025105 in words is "two hundred twelve million, twenty-five thousand, one hundred five".