2222111221212 has 12 divisors (see below), whose sum is σ = 5184926182856. Its totient is φ = 740703740400.

The previous prime is 2222111221189. The next prime is 2222111221331. The reversal of 2222111221212 is 2121221112222.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 92587967539 + ... + 92587967562.

Almost surely, 2^{2222111221212} is an apocalyptic number.

It is an amenable number.

2222111221212 is an abundant number, since it is smaller than the sum of its proper divisors (2962814961644).

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

2222111221212 is a wasteful number, since it uses less digits than its factorization.

2222111221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185175935108 (or 185175935106 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

Adding to 2222111221212 its reverse (2121221112222), we get a palindrome (4343332333434).

The spelling of 2222111221212 in words is "two trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twelve".