221552242212 has 48 divisors (see below), whose sum is σ = 625559276160. Its totient is φ = 59577073152.

The previous prime is 221552242193. The next prime is 221552242237. The reversal of 221552242212 is 212242255122.

221552242212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221552242212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77572887 + ... + 77575742.

It is an arithmetic number, because the mean of its divisors is an integer number (13032484920).

Almost surely, 2^221552242212 is an apocalyptic number.

It is an amenable number.

221552242212 is an abundant number, since it is smaller than the sum of its proper divisors (404007033948).

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

221552242212 is a wasteful number, since it uses less digits than its factorization.

221552242212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155148660 (or 155148658 counting only the distinct ones).

The product of its digits is 12800, while the sum is 30.

Adding to 221552242212 its reverse (212242255122), we get a palindrome (433794497334).

The spelling of 221552242212 in words is "two hundred twenty-one billion, five hundred fifty-two million, two hundred forty-two thousand, two hundred twelve".