1220220222 has 48 divisors (see below), whose sum is σ = 2647427328. Its totient is φ = 374768160.

The previous prime is 1220220193. The next prime is 1220220227. The reversal of 1220220222 is 2220220221.

1220220222 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220220227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1105723 + ... + 1106825.

It is an arithmetic number, because the mean of its divisors is an integer number (55154736).

Almost surely, 2^1220220222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220220222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1323713664).

1220220222 is an abundant number, since it is smaller than the sum of its proper divisors (1427207106).

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

1220220222 is a wasteful number, since it uses less digits than its factorization.

1220220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225 (or 2212 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1220220222 is about 34931.6507196554. The cubic root of 1220220222 is about 1068.5940196562.

Adding to 1220220222 its reverse (2220220221), we get a palindrome (3440440443).

Subtracting 1220220222 from its reverse (2220220221), we obtain a palindrome (999999999).

The spelling of 1220220222 in words is "one billion, two hundred twenty million, two hundred twenty thousand, two hundred twenty-two".