2212221222 has 24 divisors (see below), whose sum is σ = 4797131976. Its totient is φ = 736793856.

The previous prime is 2212221173. The next prime is 2212221241. The reversal of 2212221222 is 2221222122.

2212221222 is a `hidden beast` number, since 221 + 2 + 221 + 222 = 666.

2212221222 is digitally balanced in base 2 and base 4, 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 (18).

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

It is a junction number, because it is equal to n+sod(n) for n = 2212221195 and 2212221204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28588 + ... + 72399.

It is an arithmetic number, because the mean of its divisors is an integer number (199880499).

Almost surely, 2^2212221222 is an apocalyptic number.

2212221222 is an abundant number, since it is smaller than the sum of its proper divisors (2584910754).

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

2212221222 is a wasteful number, since it uses less digits than its factorization.

2212221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102212 (or 102209 counting only the distinct ones).

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

The square root of 2212221222 is about 47034.2558355078. The cubic root of 2212221222 is about 1302.9953066794.

Adding to 2212221222 its reverse (2221222122), we get a palindrome (4433443344).

It can be divided in two parts, 221222122 and 2, that multiplied together give a palindrome (442444244).

The spelling of 2212221222 in words is "two billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-two".