12212121221112 has 32 divisors (see below), whose sum is σ = 30810397582800. Its totient is φ = 4033361136384.

The previous prime is 12212121221081. The next prime is 12212121221189. The reversal of 12212121221112 is 21112212121221.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2334118413 + ... + 2334123644.

Almost surely, 2^{12212121221112} is an apocalyptic number.

12212121221112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12212121221112 is an abundant number, since it is smaller than the sum of its proper divisors (18598276361688).

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

12212121221112 is a wasteful number, since it uses less digits than its factorization.

12212121221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4668242175 (or 4668242171 counting only the distinct ones).

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

Adding to 12212121221112 its reverse (21112212121221), we get a palindrome (33324333342333).

The spelling of 12212121221112 in words is "twelve trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twelve".