221222406416 has 40 divisors (see below), whose sum is σ = 469933464000. Its totient is φ = 100050318720.

The previous prime is 221222406397. The next prime is 221222406421. The reversal of 221222406416 is 614604222122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3123131 + ... + 3193178.

It is an arithmetic number, because the mean of its divisors is an integer number (11748336600).

Almost surely, 2^221222406416 is an apocalyptic number.

It is an amenable number.

221222406416 is an abundant number, since it is smaller than the sum of its proper divisors (248711057584).

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

221222406416 is a wasteful number, since it uses less digits than its factorization.

221222406416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6316527 (or 6316521 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 221222406416 its reverse (614604222122), we get a palindrome (835826628538).

The spelling of 221222406416 in words is "two hundred twenty-one billion, two hundred twenty-two million, four hundred six thousand, four hundred sixteen".