111012020 has 48 divisors (see below), whose sum is σ = 268507008. Its totient is φ = 37764480.

The previous prime is 111012017. The next prime is 111012047. The reversal of 111012020 is 20210111.

It is a junction number, because it is equal to n+sod(n) for n = 111011989 and 111012007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15314 + ... + 21366.

It is an arithmetic number, because the mean of its divisors is an integer number (5593896).

Almost surely, 2^111012020 is an apocalyptic number.

111012020 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 111012020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134253504).

111012020 is an abundant number, since it is smaller than the sum of its proper divisors (157494988).

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

111012020 is a wasteful number, since it uses less digits than its factorization.

111012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6200 (or 6198 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 111012020 is about 10536.2241813659. The cubic root of 111012020 is about 480.6069001511.

Adding to 111012020 its reverse (20210111), we get a palindrome (131222131).

The spelling of 111012020 in words is "one hundred eleven million, twelve thousand, twenty".