111222020 has 96 divisors (see below), whose sum is σ = 300077568. Its totient is φ = 33656832.

The previous prime is 111222019. The next prime is 111222031. The reversal of 111222020 is 20222111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111221992 and 111222010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40532 + ... + 43188.

It is an arithmetic number, because the mean of its divisors is an integer number (3125808).

Almost surely, 2^111222020 is an apocalyptic number.

111222020 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 111222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150038784).

111222020 is an abundant number, since it is smaller than the sum of its proper divisors (188855548).

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

111222020 is a wasteful number, since it uses less digits than its factorization.

111222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709 (or 2707 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 111222020 is about 10546.1850922502. The cubic root of 111222020 is about 480.9097618736.

Adding to 111222020 its reverse (20222111), we get a palindrome (131444131).

Subtracting from 111222020 its reverse (20222111), we obtain a palindrome (90999909).

It can be divided in two parts, 1112 and 22020, that added together give a palindrome (23132).

The spelling of 111222020 in words is "one hundred eleven million, two hundred twenty-two thousand, twenty".