111003031020 has 576 divisors, whose sum is σ = 406269997056. Its totient is φ = 22452756480.

The previous prime is 111003031001. The next prime is 111003031031. The reversal of 111003031020 is 20130300111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111003030987 and 111003031005.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 70121149 + ... + 70122731.

It is an arithmetic number, because the mean of its divisors is an integer number (705329856).

Almost surely, 2^111003031020 is an apocalyptic number.

111003031020 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 111003031020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203134998528).

111003031020 is an abundant number, since it is smaller than the sum of its proper divisors (295266966036).

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

111003031020 is a wasteful number, since it uses less digits than its factorization.

111003031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710 (or 1701 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 111003031020 its reverse (20130300111), we get a palindrome (131133331131).

The spelling of 111003031020 in words is "one hundred eleven billion, three million, thirty-one thousand, twenty".