111221011101020 has 96 divisors (see below), whose sum is σ = 240315020805888. Its totient is φ = 43222609469952.

The previous prime is 111221011101007. The next prime is 111221011101043. The reversal of 111221011101020 is 20101110122111.

It is a super-2 number, since 2×111221011101020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111221011100986 and 111221011101004.

It is a congruent number.

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, 64434344 + ... + 66137936.

It is an arithmetic number, because the mean of its divisors is an integer number (2503281466728).

Almost surely, 2^{111221011101020} is an apocalyptic number.

111221011101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221011101020 is an abundant number, since it is smaller than the sum of its proper divisors (129094009704868).

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

111221011101020 is a wasteful number, since it uses less digits than its factorization.

111221011101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704339 (or 1704337 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111221011101020 its reverse (20101110122111), we get a palindrome (131322121223131).

The spelling of 111221011101020 in words is "one hundred eleven trillion, two hundred twenty-one billion, eleven million, one hundred one thousand, twenty".