12212211221112 has 64 divisors (see below), whose sum is σ = 34967719987200. Its totient is φ = 3481634413440.

The previous prime is 12212211221101. The next prime is 12212211221131. The reversal of 12212211221112 is 21112211221221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78763912 + ... + 78918807.

It is an arithmetic number, because the mean of its divisors is an integer number (546370624800).

Almost surely, 2^{12212211221112} is an apocalyptic number.

12212211221112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12212211221112 is an abundant number, since it is smaller than the sum of its proper divisors (22755508766088).

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

12212211221112 is a wasteful number, since it uses less digits than its factorization.

12212211221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157683196 (or 157683192 counting only the distinct ones).

The product of its digits is 128, while the sum is 21.

Adding to 12212211221112 its reverse (21112211221221), we get a palindrome (33324422442333).

The spelling of 12212211221112 in words is "twelve trillion, two hundred twelve billion, two hundred eleven million, two hundred twenty-one thousand, one hundred twelve".