221301222212 has 96 divisors (see below), whose sum is σ = 482926752000. Its totient is φ = 86579781120.

The previous prime is 221301222199. The next prime is 221301222271. The reversal of 221301222212 is 212222103122.

221301222212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 7838762 + ... + 7866942.

It is an arithmetic number, because the mean of its divisors is an integer number (5030487000).

Almost surely, 2^221301222212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221301222212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241463376000).

221301222212 is an abundant number, since it is smaller than the sum of its proper divisors (261625529788).

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

221301222212 is a wasteful number, since it uses less digits than its factorization.

221301222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28749 (or 28747 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 221301222212 its reverse (212222103122), we get a palindrome (433523325334).

The spelling of 221301222212 in words is "two hundred twenty-one billion, three hundred one million, two hundred twenty-two thousand, two hundred twelve".