1112022221220 has 144 divisors (see below), whose sum is σ = 3446653916160. Its totient is φ = 290082394368.

The previous prime is 1112022221197. The next prime is 1112022221239. The reversal of 1112022221220 is 221222202111.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1112022221193 and 1112022221202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17132949 + ... + 17197731.

It is an arithmetic number, because the mean of its divisors is an integer number (23935096640).

Almost surely, 2^{1112022221220} is an apocalyptic number.

1112022221220 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 1112022221220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1723326958080).

1112022221220 is an abundant number, since it is smaller than the sum of its proper divisors (2334631694940).

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

1112022221220 is a wasteful number, since it uses less digits than its factorization.

1112022221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66874 (or 66869 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1112022221220 its reverse (221222202111), we get a palindrome (1333244423331).

The spelling of 1112022221220 in words is "one trillion, one hundred twelve billion, twenty-two million, two hundred twenty-one thousand, two hundred twenty".