112221112212 has 72 divisors (see below), whose sum is σ = 309937223232. Its totient is φ = 33953760000.

The previous prime is 112221112207. The next prime is 112221112217. The reversal of 112221112212 is 212211122211.

It is an interprime number because it is at equal distance from previous prime (112221112207) and next prime (112221112217).

It is a super-3 number, since 3×112221112212³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112221112217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37212 + ... + 475212.

It is an arithmetic number, because the mean of its divisors is an integer number (4304683656).

Almost surely, 2^112221112212 is an apocalyptic number.

112221112212 is a gapful number since it is divisible by the number (12) 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 112221112212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154968611616).

112221112212 is an abundant number, since it is smaller than the sum of its proper divisors (197716111020).

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

112221112212 is a wasteful number, since it uses less digits than its factorization.

112221112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438669 (or 438664 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

Adding to 112221112212 its reverse (212211122211), we get a palindrome (324432234423).

Subtracting 112221112212 from its reverse (212211122211), we obtain a palindrome (99990009999).

The spelling of 112221112212 in words is "one hundred twelve billion, two hundred twenty-one million, one hundred twelve thousand, two hundred twelve".