1222100328 has 16 divisors (see below), whose sum is σ = 3055250880. Its totient is φ = 407366768.

The previous prime is 1222100309. The next prime is 1222100329. The reversal of 1222100328 is 8230012221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1222100329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25460400 + ... + 25460447.

It is an arithmetic number, because the mean of its divisors is an integer number (190953180).

Almost surely, 2^1222100328 is an apocalyptic number.

It is an amenable number.

1222100328 is an abundant number, since it is smaller than the sum of its proper divisors (1833150552).

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

1222100328 is a wasteful number, since it uses less digits than its factorization.

1222100328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50920856 (or 50920852 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1222100328 is about 34958.5515718257. The cubic root of 1222100328 is about 1069.1425651894.

Adding to 1222100328 its reverse (8230012221), we get a palindrome (9452112549).

The spelling of 1222100328 in words is "one billion, two hundred twenty-two million, one hundred thousand, three hundred twenty-eight".