212221221200212 has 48 divisors (see below), whose sum is σ = 433668528316800. Its totient is φ = 88993154904192.

The previous prime is 212221221200171. The next prime is 212221221200243. The reversal of 212221221200212 is 212002122122212.

It is a super-2 number, since 2×212221221200212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379332283 + ... + 379891330.

It is an arithmetic number, because the mean of its divisors is an integer number (9034761006600).

Almost surely, 2^{212221221200212} is an apocalyptic number.

It is an amenable number.

212221221200212 is an abundant number, since it is smaller than the sum of its proper divisors (221447307116588).

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

212221221200212 is a wasteful number, since it uses less digits than its factorization.

212221221200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759223840 (or 759223838 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 212221221200212 its reverse (212002122122212), we get a palindrome (424223343322424).

The spelling of 212221221200212 in words is "two hundred twelve trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, two hundred twelve".