212222222212 has 96 divisors (see below), whose sum is σ = 499734031104. Its totient is φ = 76157452800.

The previous prime is 212222222207. The next prime is 212222222213.

212222222212 is nontrivially palindromic in base 10.

212222222212 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 (212222222213) 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 31 ways as a sum of consecutive naturals, for example, 1788358 + ... + 1903330.

It is an arithmetic number, because the mean of its divisors is an integer number (5205562824).

Almost surely, 2^212222222212 is an apocalyptic number.

212222222212 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 212222222212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249867015552).

212222222212 is an abundant number, since it is smaller than the sum of its proper divisors (287511808892).

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

212222222212 is a wasteful number, since it uses less digits than its factorization.

212222222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115469 (or 115467 counting only the distinct ones).

The product of its digits is 1024, while the sum is 22.

Multiplying 212222222212 by its sum of digits (22), we get a palindrome (4668888888664).

It can be divided in two parts, 212222 and 222212, that added together give a palindrome (434434).

The spelling of 212222222212 in words is "two hundred twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twelve".