111221221122020 has 24 divisors (see below), whose sum is σ = 234963154569024. Its totient is φ = 44222090313056.

The previous prime is 111221221122019. The next prime is 111221221122031. The reversal of 111221221122020 is 20221122122111.

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 = 111221221121983 and 111221221122001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16649880062 + ... + 16649886741.

It is an arithmetic number, because the mean of its divisors is an integer number (9790131440376).

Almost surely, 2^{111221221122020} is an apocalyptic number.

111221221122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221221122020 is an abundant number, since it is smaller than the sum of its proper divisors (123741933447004).

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

111221221122020 is a wasteful number, since it uses less digits than its factorization.

111221221122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33299766979 (or 33299766977 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111221221122020 its reverse (20221122122111), we get a palindrome (131442343244131).

The spelling of 111221221122020 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty".