2222121211212 has 24 divisors (see below), whose sum is σ = 5925656563456. Its totient is φ = 634891774608.

The previous prime is 2222121211207. The next prime is 2222121211213. The reversal of 2222121211212 is 2121121212222.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

It is not an unprimeable number, because it can be changed into a prime (2222121211213) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13226911888 + ... + 13226912055.

Almost surely, 2^{2222121211212} is an apocalyptic number.

It is an amenable number.

2222121211212 is an abundant number, since it is smaller than the sum of its proper divisors (3703535352244).

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

2222121211212 is a wasteful number, since it uses less digits than its factorization.

2222121211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26453823957 (or 26453823955 counting only the distinct ones).

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

Adding to 2222121211212 its reverse (2121121212222), we get a palindrome (4343242423434).

The spelling of 2222121211212 in words is "two trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twelve".