1223322220 has 24 divisors (see below), whose sum is σ = 2704186800. Its totient is φ = 463574592.

The previous prime is 1223322209. The next prime is 1223322223. The reversal of 1223322220 is 222233221.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (1223322223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1609255 + ... + 1610014.

It is an arithmetic number, because the mean of its divisors is an integer number (112674450).

Almost surely, 2^1223322220 is an apocalyptic number.

1223322220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223322220 is an abundant number, since it is smaller than the sum of its proper divisors (1480864580).

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

1223322220 is a wasteful number, since it uses less digits than its factorization.

1223322220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219297 (or 3219295 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1223322220 is about 34976.0235018219. The cubic root of 1223322220 is about 1069.4987666061.

Adding to 1223322220 its reverse (222233221), we get a palindrome (1445555441).

It can be divided in two parts, 12233 and 22220, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 1223322220 in words is "one billion, two hundred twenty-three million, three hundred twenty-two thousand, two hundred twenty".