112212121021220 has 192 divisors, whose sum is σ = 273699876925440. Its totient is φ = 38214817344000.

The previous prime is 112212121021213. The next prime is 112212121021223. The reversal of 112212121021220 is 22120121212211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 112212121021192 and 112212121021201.

It is not an unprimeable number, because it can be changed into a prime (112212121021223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 272945057 + ... + 273355863.

It is an arithmetic number, because the mean of its divisors is an integer number (1425520192320).

Almost surely, 2^{112212121021220} is an apocalyptic number.

112212121021220 is a gapful number since it is divisible by the number (10) 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 112212121021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136849938462720).

112212121021220 is an abundant number, since it is smaller than the sum of its proper divisors (161487755904220).

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

112212121021220 is a wasteful number, since it uses less digits than its factorization.

112212121021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411594 (or 411592 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 112212121021220 its reverse (22120121212211), we get a palindrome (134332242233431).

The spelling of 112212121021220 in words is "one hundred twelve trillion, two hundred twelve billion, one hundred twenty-one million, twenty-one thousand, two hundred twenty".