22222022212 has 72 divisors (see below), whose sum is σ = 43558187400. Its totient is φ = 9860616192.

The previous prime is 22222022197. The next prime is 22222022219. The reversal of 22222022212 is 21222022222.

It can be written as a sum of positive squares in 12 ways, for example, as 12228821056 + 9993201156 = 110584^2 + 99966^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22222022212.

It is not an unprimeable number, because it can be changed into a prime (22222022219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11762964 + ... + 11764852.

It is an arithmetic number, because the mean of its divisors is an integer number (604974825).

Almost surely, 2^22222022212 is an apocalyptic number.

It is an amenable number.

22222022212 is a deficient number, since it is larger than the sum of its proper divisors (21336165188).

22222022212 is a wasteful number, since it uses less digits than its factorization.

22222022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233 (or 2202 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 22222022212 its reverse (21222022222), we get a palindrome (43444044434).

The spelling of 22222022212 in words is "twenty-two billion, two hundred twenty-two million, twenty-two thousand, two hundred twelve".