111221102211212 has 24 divisors (see below), whose sum is σ = 222898964623104. Its totient is φ = 47568309476112.

The previous prime is 111221102211209. The next prime is 111221102211229. The reversal of 111221102211212 is 212112201122111.

It is a happy number.

It is an unprimeable number.

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, 4078202198 + ... + 4078229469.

It is an arithmetic number, because the mean of its divisors is an integer number (9287456859296).

Almost surely, 2^{111221102211212} is an apocalyptic number.

It is an amenable number.

111221102211212 is an abundant number, since it is smaller than the sum of its proper divisors (111677862411892).

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

111221102211212 is a wasteful number, since it uses less digits than its factorization.

111221102211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8156432165 (or 8156432163 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111221102211212 its reverse (212112201122111), we get a palindrome (323333303333323).

The spelling of 111221102211212 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred two million, two hundred eleven thousand, two hundred twelve".