12212212021100 has 144 divisors (see below), whose sum is σ = 32641452979968. Its totient is φ = 3861947669760.

The previous prime is 12212212021027. The next prime is 12212212021111. The reversal of 12212212021100 is 112021221221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11152307 + ... + 12198293.

Almost surely, 2^{12212212021100} is an apocalyptic number.

12212212021100 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 12212212021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16320726489984).

12212212021100 is an abundant number, since it is smaller than the sum of its proper divisors (20429240958868).

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

12212212021100 is a wasteful number, since it uses less digits than its factorization.

12212212021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047304 (or 1047297 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12212212021100 its reverse (112021221221), we get a palindrome (12324233242321).

The spelling of 12212212021100 in words is "twelve trillion, two hundred twelve billion, two hundred twelve million, twenty-one thousand, one hundred".