12222220211100 has 216 divisors, whose sum is σ = 39557950490240. Its totient is φ = 3153142080000.

The previous prime is 12222220211081. The next prime is 12222220211101. The reversal of 12222220211100 is 111202222221.

It is a happy number.

12222220211100 is a `hidden beast` number, since 1 + 2 + 222 + 220 + 211 + 10 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222220211101) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 92031546 + ... + 92164254.

Almost surely, 2^{12222220211100} is an apocalyptic number.

12222220211100 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 12222220211100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19778975245120).

12222220211100 is an abundant number, since it is smaller than the sum of its proper divisors (27335730279140).

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

12222220211100 is a wasteful number, since it uses less digits than its factorization.

12222220211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136061 (or 136051 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12222220211100 its reverse (111202222221), we get a palindrome (12333422433321).

The spelling of 12222220211100 in words is "twelve trillion, two hundred twenty-two billion, two hundred twenty million, two hundred eleven thousand, one hundred".