111201210221020 has 96 divisors (see below), whose sum is σ = 256306298431680. Its totient is φ = 40338074972160.

The previous prime is 111201210221009. The next prime is 111201210221027. The reversal of 111201210221020 is 20122012102111.

It is a junction number, because it is equal to n+sod(n) for n = 111201210220985 and 111201210221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201210221027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6643479 + ... + 16325998.

It is an arithmetic number, because the mean of its divisors is an integer number (2669857275330).

Almost surely, 2^{111201210221020} is an apocalyptic number.

111201210221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201210221020 is an abundant number, since it is smaller than the sum of its proper divisors (145105088210660).

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

111201210221020 is a wasteful number, since it uses less digits than its factorization.

111201210221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22970023 (or 22970021 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111201210221020 its reverse (20122012102111), we get a palindrome (131323222323131).

The spelling of 111201210221020 in words is "one hundred eleven trillion, two hundred one billion, two hundred ten million, two hundred twenty-one thousand, twenty".