12220222121100 has 576 divisors, whose sum is σ = 45779769907200. Its totient is φ = 2738417310720.

The previous prime is 12220222121071. The next prime is 12220222121131. The reversal of 12220222121100 is 112122202221.

It is a happy number.

12220222121100 is a `hidden beast` number, since 1 + 2 + 220 + 222 + 121 + 100 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1599711081 + ... + 1599718719.

It is an arithmetic number, because the mean of its divisors is an integer number (79478767200).

Almost surely, 2^{12220222121100} is an apocalyptic number.

12220222121100 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 12220222121100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22889884953600).

12220222121100 is an abundant number, since it is smaller than the sum of its proper divisors (33559547786100).

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

12220222121100 is a wasteful number, since it uses less digits than its factorization.

12220222121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9319 (or 9306 counting only the distinct ones).

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

Adding to 12220222121100 its reverse (112122202221), we get a palindrome (12332344323321).

The spelling of 12220222121100 in words is "twelve trillion, two hundred twenty billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred".