221231222020212 has 48 divisors (see below), whose sum is σ = 517079316432000. Its totient is φ = 73619037757440.

The previous prime is 221231222020189. The next prime is 221231222020217. The reversal of 221231222020212 is 212020222132122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221231222020217) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 56876664 + ... + 60641712.

It is an arithmetic number, because the mean of its divisors is an integer number (10772485759000).

Almost surely, 2^{221231222020212} is an apocalyptic number.

It is an amenable number.

221231222020212 is an abundant number, since it is smaller than the sum of its proper divisors (295848094411788).

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

221231222020212 is a wasteful number, since it uses less digits than its factorization.

221231222020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3773336 (or 3773334 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 221231222020212 its reverse (212020222132122), we get a palindrome (433251444152334).

The spelling of 221231222020212 in words is "two hundred twenty-one trillion, two hundred thirty-one billion, two hundred twenty-two million, twenty thousand, two hundred twelve".