12221102100 has 144 divisors (see below), whose sum is σ = 38421985280. Its totient is φ = 2987798400.

The previous prime is 12221102099. The next prime is 12221102107. The reversal of 12221102100 is 120112221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221102107) 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, 142119 + ... + 211281.

Almost surely, 2^12221102100 is an apocalyptic number.

12221102100 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 12221102100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19210992640).

12221102100 is an abundant number, since it is smaller than the sum of its proper divisors (26200883180).

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

12221102100 is a wasteful number, since it uses less digits than its factorization.

12221102100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69230 (or 69223 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12221102100 its reverse (120112221), we get a palindrome (12341214321).

The spelling of 12221102100 in words is "twelve billion, two hundred twenty-one million, one hundred two thousand, one hundred".