111221031123020 has 96 divisors (see below), whose sum is σ = 289367321220096. Its totient is φ = 34966512864000.

The previous prime is 111221031122951. The next prime is 111221031123053. The reversal of 111221031123020 is 20321130122111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 111221031122983 and 111221031123001.

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, 202077686 + ... + 202627325.

It is an arithmetic number, because the mean of its divisors is an integer number (3014242929376).

Almost surely, 2^{111221031123020} is an apocalyptic number.

111221031123020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221031123020 is an abundant number, since it is smaller than the sum of its proper divisors (178146290097076).

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

111221031123020 is a wasteful number, since it uses less digits than its factorization.

111221031123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404705191 (or 404705189 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 111221031123020 its reverse (20321130122111), we get a palindrome (131542161245131).

The spelling of 111221031123020 in words is "one hundred eleven trillion, two hundred twenty-one billion, thirty-one million, one hundred twenty-three thousand, twenty".