12222200100 has 144 divisors (see below), whose sum is σ = 38619403200. Its totient is φ = 2959756800.

The previous prime is 12222200087. The next prime is 12222200101. The reversal of 12222200100 is 100222221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (12222200101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4793626 + ... + 4796174.

It is an arithmetic number, because the mean of its divisors is an integer number (268190300).

Almost surely, 2^12222200100 is an apocalyptic number.

12222200100 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 12222200100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19309701600).

12222200100 is an abundant number, since it is smaller than the sum of its proper divisors (26397203100).

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

12222200100 is a wasteful number, since it uses less digits than its factorization.

12222200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030 (or 4023 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 12222200100 its reverse (100222221), we get a palindrome (12322422321).

It can be divided in two parts, 122 and 22200100, that added together give a palindrome (22200222).

The spelling of 12222200100 in words is "twelve billion, two hundred twenty-two million, two hundred thousand, one hundred".