111101110221220 has 48 divisors (see below), whose sum is σ = 266651978785920. Its totient is φ = 38090478610944.

The previous prime is 111101110221187. The next prime is 111101110221229. The reversal of 111101110221220 is 22122011101111.

It is a junction number, because it is equal to n+sod(n) for n = 111101110221194 and 111101110221203.

It is not an unprimeable number, because it can be changed into a prime (111101110221229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9834190 + ... + 17858149.

It is an arithmetic number, because the mean of its divisors is an integer number (5555249558040).

Almost surely, 2^{111101110221220} is an apocalyptic number.

111101110221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111101110221220 is an abundant number, since it is smaller than the sum of its proper divisors (155550868564700).

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

111101110221220 is a wasteful number, since it uses less digits than its factorization.

111101110221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27721012 (or 27721010 counting only the distinct ones).

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

Adding to 111101110221220 its reverse (22122011101111), we get a palindrome (133223121322331).

The spelling of 111101110221220 in words is "one hundred eleven trillion, one hundred one billion, one hundred ten million, two hundred twenty-one thousand, two hundred twenty".