212221110221212 has 12 divisors (see below), whose sum is σ = 371387079289576. Its totient is φ = 106110516138480.

The previous prime is 212221110221149. The next prime is 212221110221227. The reversal of 212221110221212 is 212122011122212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4981963 + ... + 21195805.

Almost surely, 2^{212221110221212} is an apocalyptic number.

It is an amenable number.

212221110221212 is a deficient number, since it is larger than the sum of its proper divisors (159165969068364).

212221110221212 is a wasteful number, since it uses less digits than its factorization.

212221110221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19486068 (or 19486066 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 212221110221212 its reverse (212122011122212), we get a palindrome (424343121343424).

The spelling of 212221110221212 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred ten million, two hundred twenty-one thousand, two hundred twelve".