12222232100 has 54 divisors (see below), whose sum is σ = 28719392310. Its totient is φ = 4512817920.

The previous prime is 12222232063. The next prime is 12222232103. The reversal of 12222232100 is 123222221.

It can be written as a sum of positive squares in 9 ways, for example, as 7116272164 + 5105959936 = 84358^2 + 71456^2 .

It is not an unprimeable number, because it can be changed into a prime (12222232103) 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 17 ways as a sum of consecutive naturals, for example, 344705 + ... + 378504.

Almost surely, 2^12222232100 is an apocalyptic number.

12222232100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12222232100 is an abundant number, since it is smaller than the sum of its proper divisors (16497160210).

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

12222232100 is a wasteful number, since it uses less digits than its factorization.

12222232100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723249 (or 723229 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 12222232100 its reverse (123222221), we get a palindrome (12345454321).

It can be divided in two parts, 1222 and 2232100, that added together give a palindrome (2233322).

The spelling of 12222232100 in words is "twelve billion, two hundred twenty-two million, two hundred thirty-two thousand, one hundred".