212212121002210 has 48 divisors (see below), whose sum is σ = 444505064374584. Its totient is φ = 72732427987968.

The previous prime is 212212121002157. The next prime is 212212121002247. The reversal of 212212121002210 is 12200121212212.

It can be written as a sum of positive squares in 4 ways, for example, as 163918780667929 + 48293340334281 = 12803077^2 + 6949341^2 .

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 23 ways as a sum of consecutive naturals, for example, 76049199 + ... + 78790258.

Almost surely, 2^{212212121002210} is an apocalyptic number.

212212121002210 is an abundant number, since it is smaller than the sum of its proper divisors (232292943372374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212212121002210 is a wasteful number, since it uses less digits than its factorization.

212212121002210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154842275 (or 154842268 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212212121002210 its reverse (12200121212212), we get a palindrome (224412242214422).

The spelling of 212212121002210 in words is "two hundred twelve trillion, two hundred twelve billion, one hundred twenty-one million, two thousand, two hundred ten".