212412205 has 4 divisors (see below), whose sum is σ = 254894652. Its totient is φ = 169929760.

The previous prime is 212412203. The next prime is 212412241. The reversal of 212412205 is 502214212.

212412205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27071209 + 185340996 = 5203^2 + 13614^2 .

It is not a de Polignac number, because 212412205 - 2¹ = 212412203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212412203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21241216 + ... + 21241225.

It is an arithmetic number, because the mean of its divisors is an integer number (63723663).

Almost surely, 2^212412205 is an apocalyptic number.

It is an amenable number.

212412205 is a deficient number, since it is larger than the sum of its proper divisors (42482447).

212412205 is an equidigital number, since it uses as much as digits as its factorization.

212412205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42482446.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 212412205 is about 14574.3680823561. The cubic root of 212412205 is about 596.6594027947.

Adding to 212412205 its reverse (502214212), we get a palindrome (714626417).

The spelling of 212412205 in words is "two hundred twelve million, four hundred twelve thousand, two hundred five".