212122220210 has 16 divisors (see below), whose sum is σ = 381828327192. Its totient is φ = 84847036800.

The previous prime is 212122220207. The next prime is 212122220257. The reversal of 212122220210 is 12022221212.

It is a happy number.

212122220210 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 127929974929 + 84192245281 = 357673^2 + 290159^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310190 + ... + 721430.

Almost surely, 2^212122220210 is an apocalyptic number.

212122220210 is a deficient number, since it is larger than the sum of its proper divisors (169706106982).

212122220210 is a wasteful number, since it uses less digits than its factorization.

212122220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462829.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212122220210 its reverse (12022221212), we get a palindrome (224144441422).

It can be divided in two parts, 21212 and 2220210, that added together give a palindrome (2241422).

The spelling of 212122220210 in words is "two hundred twelve billion, one hundred twenty-two million, two hundred twenty thousand, two hundred ten".