1223202222 has 64 divisors (see below), whose sum is σ = 3002065920. Its totient is φ = 370652760.

The previous prime is 1223202161. The next prime is 1223202257. The reversal of 1223202222 is 2222023221.

1223202222 is a `hidden beast` number, since 122 + 320 + 2 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1223202195 and 1223202204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35403 + ... + 60825.

It is an arithmetic number, because the mean of its divisors is an integer number (46907280).

Almost surely, 2^1223202222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223202222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1501032960).

1223202222 is an abundant number, since it is smaller than the sum of its proper divisors (1778863698).

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

1223202222 is an equidigital number, since it uses as much as digits as its factorization.

1223202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25457 (or 25439 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1223202222 is about 34974.3080274650. The cubic root of 1223202222 is about 1069.4637957408.

Adding to 1223202222 its reverse (2222023221), we get a palindrome (3445225443).

The spelling of 1223202222 in words is "one billion, two hundred twenty-three million, two hundred two thousand, two hundred twenty-two".