212212205 has 16 divisors (see below), whose sum is σ = 269981184. Its totient is φ = 159848640.

The previous prime is 212212201. The next prime is 212212213. The reversal of 212212205 is 502212212.

It is not a de Polignac number, because 212212205 - 2² = 212212201 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 (212212201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12767 + ... + 24236.

It is an arithmetic number, because the mean of its divisors is an integer number (16873824).

Almost surely, 2^212212205 is an apocalyptic number.

It is an amenable number.

212212205 is a deficient number, since it is larger than the sum of its proper divisors (57768979).

212212205 is a wasteful number, since it uses less digits than its factorization.

212212205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37076.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 212212205 is about 14567.5051055423. The cubic root of 212212205 is about 596.4720793574.

Adding to 212212205 its reverse (502212212), we get a palindrome (714424417).

The spelling of 212212205 in words is "two hundred twelve million, two hundred twelve thousand, two hundred five".