111223223020 has 144 divisors (see below), whose sum is σ = 289471976640. Its totient is φ = 35148791808.

The previous prime is 111223223011. The next prime is 111223223029. The reversal of 111223223020 is 20322322111.

It is an interprime number because it is at equal distance from previous prime (111223223011) and next prime (111223223029).

It is not an unprimeable number, because it can be changed into a prime (111223223029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18191484 + ... + 18197596.

It is an arithmetic number, because the mean of its divisors is an integer number (2010222060).

Almost surely, 2^111223223020 is an apocalyptic number.

111223223020 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 111223223020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144735988320).

111223223020 is an abundant number, since it is smaller than the sum of its proper divisors (178248753620).

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

111223223020 is a wasteful number, since it uses less digits than its factorization.

111223223020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6924 (or 6909 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 111223223020 its reverse (20322322111), we get a palindrome (131545545131).

Subtracting from 111223223020 its reverse (20322322111), we obtain a palindrome (90900900909).

The spelling of 111223223020 in words is "one hundred eleven billion, two hundred twenty-three million, two hundred twenty-three thousand, twenty".