12222111221100 has 216 divisors, whose sum is σ = 42921733593648. Its totient is φ = 2882856614400.

The previous prime is 12222111221071. The next prime is 12222111221129. The reversal of 12222111221100 is 112211122221.

12222111221100 is a `hidden beast` number, since 1 + 222 + 211 + 1 + 221 + 10 + 0 = 666.

12222111221100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12222111221071) and next prime (12222111221129).

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 71 ways as a sum of consecutive naturals, for example, 16316899 + ... + 17049498.

Almost surely, 2^{12222111221100} is an apocalyptic number.

12222111221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12222111221100 is an abundant number, since it is smaller than the sum of its proper divisors (30699622372548).

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

12222111221100 is a wasteful number, since it uses less digits than its factorization.

12222111221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33366465 (or 33366455 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12222111221100 its reverse (112211122221), we get a palindrome (12334322343321).

The spelling of 12222111221100 in words is "twelve trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, one hundred".