212221211101212 has 12 divisors (see below), whose sum is σ = 495182825902856. Its totient is φ = 70740403700400.

The previous prime is 212221211101171. The next prime is 212221211101223. The reversal of 212221211101212 is 212101112122212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8842550462539 + ... + 8842550462562.

Almost surely, 2^{212221211101212} is an apocalyptic number.

It is an amenable number.

212221211101212 is an abundant number, since it is smaller than the sum of its proper divisors (282961614801644).

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

212221211101212 is a wasteful number, since it uses less digits than its factorization.

212221211101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17685100925108 (or 17685100925106 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 212221211101212 its reverse (212101112122212), we get a palindrome (424322323223424).

The spelling of 212221211101212 in words is "two hundred twelve trillion, two hundred twenty-one billion, two hundred eleven million, one hundred one thousand, two hundred twelve".