111201221210020 has 12 divisors (see below), whose sum is σ = 233522564541084. Its totient is φ = 44480488484000.

The previous prime is 111201221209951. The next prime is 111201221210039. The reversal of 111201221210020 is 20012122102111.

It can be written as a sum of positive squares in 2 ways, for example, as 11890469441536 + 99310751768484 = 3448256^2 + 9965478^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111201221209976 and 111201221210003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780030530231 + ... + 2780030530270.

It is an arithmetic number, because the mean of its divisors is an integer number (19460213711757).

Almost surely, 2^{111201221210020} is an apocalyptic number.

111201221210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201221210020 is an abundant number, since it is smaller than the sum of its proper divisors (122321343331064).

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

111201221210020 is a wasteful number, since it uses less digits than its factorization.

111201221210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560061060510 (or 5560061060508 counting only the distinct ones).

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

Adding to 111201221210020 its reverse (20012122102111), we get a palindrome (131213343312131).

The spelling of 111201221210020 in words is "one hundred eleven trillion, two hundred one billion, two hundred twenty-one million, two hundred ten thousand, twenty".