2221222121212 has 12 divisors (see below), whose sum is σ = 3893542569280. Its totient is φ = 1108781387136.

The previous prime is 2221222121123. The next prime is 2221222121219. The reversal of 2221222121212 is 2121212221222.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221222121219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457415637 + ... + 457420492.

Almost surely, 2^{2221222121212} is an apocalyptic number.

It is an amenable number.

2221222121212 is a deficient number, since it is larger than the sum of its proper divisors (1672320448068).

2221222121212 is a wasteful number, since it uses less digits than its factorization.

2221222121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914836740 (or 914836738 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

Adding to 2221222121212 its reverse (2121212221222), we get a palindrome (4342434342434).

The spelling of 2221222121212 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twelve".