111222120220 has 24 divisors (see below), whose sum is σ = 247305656304. Its totient is φ = 41871856896.

The previous prime is 111222120161. The next prime is 111222120293. The reversal of 111222120220 is 22021222111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111222120194 and 111222120203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163561602 + ... + 163562281.

It is an arithmetic number, because the mean of its divisors is an integer number (10304402346).

Almost surely, 2^111222120220 is an apocalyptic number.

111222120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111222120220 is an abundant number, since it is smaller than the sum of its proper divisors (136083536084).

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

111222120220 is a wasteful number, since it uses less digits than its factorization.

111222120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327123909 (or 327123907 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 111222120220 its reverse (22021222111), we get a palindrome (133243342331).

The spelling of 111222120220 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twenty".