111230220220 has 96 divisors (see below), whose sum is σ = 279445856256. Its totient is φ = 36385977600.

The previous prime is 111230220137. The next prime is 111230220221. The reversal of 111230220220 is 22022032111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111230220194 and 111230220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111230220221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127654 + ... + 488626.

It is an arithmetic number, because the mean of its divisors is an integer number (2910894336).

Almost surely, 2^111230220220 is an apocalyptic number.

111230220220 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 111230220220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139722928128).

111230220220 is an abundant number, since it is smaller than the sum of its proper divisors (168215636036).

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

111230220220 is a wasteful number, since it uses less digits than its factorization.

111230220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361091 (or 361089 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 111230220220 its reverse (22022032111), we get a palindrome (133252252331).

The spelling of 111230220220 in words is "one hundred eleven billion, two hundred thirty million, two hundred twenty thousand, two hundred twenty".