111111222220 has 96 divisors (see below), whose sum is σ = 237222720000. Its totient is φ = 43712193024.

The previous prime is 111111222191. The next prime is 111111222223. The reversal of 111111222220 is 22222111111.

It is a junction number, because it is equal to n+sod(n) for n = 111111222194 and 111111222203.

It is not an unprimeable number, because it can be changed into a prime (111111222223) 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, 222667531 + ... + 222668029.

It is an arithmetic number, because the mean of its divisors is an integer number (2471070000).

Almost surely, 2^111111222220 is an apocalyptic number.

111111222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111222220 is an abundant number, since it is smaller than the sum of its proper divisors (126111497780).

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

111111222220 is a wasteful number, since it uses less digits than its factorization.

111111222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111111222220 its reverse (22222111111), we get a palindrome (133333333331).

The spelling of 111111222220 in words is "one hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty".