1222320300 has 72 divisors (see below), whose sum is σ = 3548012496. Its totient is φ = 324898560.

The previous prime is 1222320289. The next prime is 1222320301. The reversal of 1222320300 is 30232221.

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 1222320300.

It is not an unprimeable number, because it can be changed into a prime (1222320301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88674 + ... + 101526.

Almost surely, 2^1222320300 is an apocalyptic number.

1222320300 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 1222320300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1774006248).

1222320300 is an abundant number, since it is smaller than the sum of its proper divisors (2325692196).

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

1222320300 is a wasteful number, since it uses less digits than its factorization.

1222320300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13187 (or 13180 counting only the distinct ones).

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

The square root of 1222320300 is about 34961.6976132453. The cubic root of 1222320300 is about 1069.2067081281.

Adding to 1222320300 its reverse (30232221), we get a palindrome (1252552521).

It can be divided in two parts, 12223 and 20300, that added together give a palindrome (32523).

The spelling of 1222320300 in words is "one billion, two hundred twenty-two million, three hundred twenty thousand, three hundred".