12212221112112 has 80 divisors (see below), whose sum is σ = 36790948006400. Its totient is φ = 3489206027328.

The previous prime is 12212221112087. The next prime is 12212221112167. The reversal of 12212221112112 is 21121112221221.

12212221112112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12212221112112² (a number of 27 digits) contains 22 as substring.

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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370860028 + ... + 370892955.

It is an arithmetic number, because the mean of its divisors is an integer number (459886850080).

Almost surely, 2^{12212221112112} is an apocalyptic number.

12212221112112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12212221112112 is an abundant number, since it is smaller than the sum of its proper divisors (24578726894288).

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

12212221112112 is an equidigital number, since it uses as much as digits as its factorization.

12212221112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741753015 (or 741752995 counting only the distinct ones).

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

Adding to 12212221112112 its reverse (21121112221221), we get a palindrome (33333333333333).

The spelling of 12212221112112 in words is "twelve trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twelve thousand, one hundred twelve".