111311020 has 12 divisors (see below), whose sum is σ = 233753184. Its totient is φ = 44524400.

The previous prime is 111311003. The next prime is 111311027. The reversal of 111311020 is 20113111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 111310988 and 111311006.

It is not an unprimeable number, because it can be changed into a prime (111311027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2782756 + ... + 2782795.

It is an arithmetic number, because the mean of its divisors is an integer number (19479432).

Almost surely, 2^111311020 is an apocalyptic number.

111311020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111311020 is an abundant number, since it is smaller than the sum of its proper divisors (122442164).

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

111311020 is a wasteful number, since it uses less digits than its factorization.

111311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5565560 (or 5565558 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 111311020 is about 10550.4037837421. The cubic root of 111311020 is about 481.0380025386.

Adding to 111311020 its reverse (20113111), we get a palindrome (131424131).

The spelling of 111311020 in words is "one hundred eleven million, three hundred eleven thousand, twenty".