1223220300 has 72 divisors (see below), whose sum is σ = 3545262672. Its totient is φ = 325632000.

The previous prime is 1223220277. The next prime is 1223220301. The reversal of 1223220300 is 30223221.

1223220300 is digitally balanced in base 6, because in such base 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 (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1223220300.

It is not an unprimeable number, because it can be changed into a prime (1223220301) 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, 189120 + ... + 195480.

Almost surely, 2^1223220300 is an apocalyptic number.

1223220300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223220300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1772631336).

1223220300 is an abundant number, since it is smaller than the sum of its proper divisors (2322042372).

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

1223220300 is a wasteful number, since it uses less digits than its factorization.

1223220300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7019 (or 7012 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1223220300 is about 34974.5664733675. The cubic root of 1223220300 is about 1069.4690643358.

Adding to 1223220300 its reverse (30223221), we get a palindrome (1253443521).

The spelling of 1223220300 in words is "one billion, two hundred twenty-three million, two hundred twenty thousand, three hundred".