111020020 has 24 divisors (see below), whose sum is σ = 233420544. Its totient is φ = 44354976.

The previous prime is 111020003. The next prime is 111020029. The reversal of 111020020 is 20020111.

It is a junction number, because it is equal to n+sod(n) for n = 111019985 and 111020012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020029) 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, 16837 + ... + 22483.

It is an arithmetic number, because the mean of its divisors is an integer number (9725856).

Almost surely, 2^111020020 is an apocalyptic number.

111020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111020020 is an abundant number, since it is smaller than the sum of its proper divisors (122400524).

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

111020020 is a wasteful number, since it uses less digits than its factorization.

111020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6639 (or 6637 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 111020020 is about 10536.6038171699. The cubic root of 111020020 is about 480.6184447353.

Adding to 111020020 its reverse (20020111), we get a palindrome (131040131).

Subtracting from 111020020 its reverse (20020111), we obtain a palindrome (90999909).

The spelling of 111020020 in words is "one hundred eleven million, twenty thousand, twenty".