2222212212 has 144 divisors (see below), whose sum is σ = 6391492800. Its totient is φ = 662126400.

The previous prime is 2222212211. The next prime is 2222212243. The reversal of 2222212212 is 2122122222.

2222212212 is a `hidden beast` number, since 222 + 221 + 221 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

Its product of digits (256) is a multiple of the sum of its prime divisors (256).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222212211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16963387 + ... + 16963517.

Almost surely, 2^2222212212 is an apocalyptic number.

2222212212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2222212212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3195746400).

2222212212 is an abundant number, since it is smaller than the sum of its proper divisors (4169280588).

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

2222212212 is a wasteful number, since it uses less digits than its factorization.

2222212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 256 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 2222212212 is about 47140.3459045434. The cubic root of 2222212212 is about 1304.9539209519.

Adding to 2222212212 its reverse (2122122222), we get a palindrome (4344334434).

The spelling of 2222212212 in words is "two billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twelve".