111221220202208 has 48 divisors (see below), whose sum is σ = 225049070952720. Its totient is φ = 54107619850368.

The previous prime is 111221220202207. The next prime is 111221220202217. The reversal of 111221220202208 is 802202022122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221220202207) 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 7 ways as a sum of consecutive naturals, for example, 32687666 + ... + 35929457.

It is an arithmetic number, because the mean of its divisors is an integer number (4688522311515).

Almost surely, 2^{111221220202208} is an apocalyptic number.

It is an amenable number.

111221220202208 is an abundant number, since it is smaller than the sum of its proper divisors (113827850750512).

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

111221220202208 is an frugal number, since it uses more digits than its factorization.

111221220202208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68617244 (or 68617162 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

Adding to 111221220202208 its reverse (802202022122111), we get a palindrome (913423242324319).

The spelling of 111221220202208 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred twenty million, two hundred two thousand, two hundred eight".