111222201220 has 24 divisors (see below), whose sum is σ = 251533286424. Its totient is φ = 41066658816.

The previous prime is 111222201173. The next prime is 111222201221. The reversal of 111222201220 is 22102222111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2132038276 + 109090162944 = 46174^2 + 330288^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111222201194 and 111222201203.

It is not an unprimeable number, because it can be changed into a prime (111222201221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213888589 + ... + 213889108.

It is an arithmetic number, because the mean of its divisors is an integer number (10480553601).

Almost surely, 2^111222201220 is an apocalyptic number.

111222201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111222201220 is an abundant number, since it is smaller than the sum of its proper divisors (140311085204).

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

111222201220 is a wasteful number, since it uses less digits than its factorization.

111222201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427777719 (or 427777717 counting only the distinct ones).

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

Adding to 111222201220 its reverse (22102222111), we get a palindrome (133324423331).

The spelling of 111222201220 in words is "one hundred eleven billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty".