12212201111112 has 80 divisors (see below), whose sum is σ = 34212798997740. Its totient is φ = 4069861576704.

The previous prime is 12212201111101. The next prime is 12212201111203. The reversal of 12212201111112 is 21111110221221.

It is a happy number.

12212201111112 is a `hidden beast` number, since 1 + 221 + 220 + 1 + 111 + 112 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8577435983076 + 3634765128036 = 2928726^2 + 1906506^2 .

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 19 ways as a sum of consecutive naturals, for example, 1011628 + ... + 5044580.

Almost surely, 2^{12212201111112} is an apocalyptic number.

12212201111112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12212201111112 is an abundant number, since it is smaller than the sum of its proper divisors (22000597886628).

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

12212201111112 is a wasteful number, since it uses less digits than its factorization.

12212201111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037644 (or 4037631 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12212201111112 its reverse (21111110221221), we get a palindrome (33323311332333).

It can be divided in two parts, 1221220 and 1111112, that added together give a palindrome (2332332).

The spelling of 12212201111112 in words is "twelve trillion, two hundred twelve billion, two hundred one million, one hundred eleven thousand, one hundred twelve".