111221000220020 has 24 divisors (see below), whose sum is σ = 243719061352704. Its totient is φ = 42554121823136.

The previous prime is 111221000219983. The next prime is 111221000220059. The reversal of 111221000220020 is 20022000122111.

It is a super-2 number, since 2×111221000220020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111221000219977 and 111221000220004.

It is a congruent number.

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, 120892391084 + ... + 120892392003.

It is an arithmetic number, because the mean of its divisors is an integer number (10154960889696).

Almost surely, 2^{111221000220020} is an apocalyptic number.

111221000220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221000220020 is an abundant number, since it is smaller than the sum of its proper divisors (132498061132684).

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

111221000220020 is a wasteful number, since it uses less digits than its factorization.

111221000220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241784783119 (or 241784783117 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 111221000220020 its reverse (20022000122111), we get a palindrome (131243000342131).

The spelling of 111221000220020 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred twenty thousand, twenty".