12222221220100 has 18 divisors (see below), whose sum is σ = 26522220047834. Its totient is φ = 4888888488000.

The previous prime is 12222221220037. The next prime is 12222221220103. The reversal of 12222221220100 is 102212222221.

12222221220100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1788494323716 + 10433726896384 = 1337346^2 + 3230128^2 .

It is not an unprimeable number, because it can be changed into a prime (12222221220103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61111106001 + ... + 61111106200.

Almost surely, 2^{12222221220100} is an apocalyptic number.

12222221220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12222221220100 is an abundant number, since it is smaller than the sum of its proper divisors (14299998827734).

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

12222221220100 is a wasteful number, since it uses less digits than its factorization.

12222221220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122222212215 (or 122222212208 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12222221220100 its reverse (102212222221), we get a palindrome (12324433442321).

The spelling of 12222221220100 in words is "twelve trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty thousand, one hundred".