111122221210220 has 96 divisors (see below), whose sum is σ = 269674839544320. Its totient is φ = 38012908989440.

The previous prime is 111122221210219. The next prime is 111122221210267. The reversal of 111122221210220 is 22012122221111.

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 = 111122221210192 and 111122221210201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 687071 + ... + 14923689.

It is an arithmetic number, because the mean of its divisors is an integer number (2809112911920).

Almost surely, 2^{111122221210220} is an apocalyptic number.

111122221210220 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 111122221210220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134837419772160).

111122221210220 is an abundant number, since it is smaller than the sum of its proper divisors (158552618334100).

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

111122221210220 is a wasteful number, since it uses less digits than its factorization.

111122221210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14238743 (or 14238741 counting only the distinct ones).

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

Adding to 111122221210220 its reverse (22012122221111), we get a palindrome (133134343431331).

The spelling of 111122221210220 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred ten thousand, two hundred twenty".