111100111221000 has 128 divisors (see below), whose sum is σ = 378144378668160. Its totient is φ = 26933360288000.

The previous prime is 111100111220993. The next prime is 111100111221019. The reversal of 111100111221000 is 122111001111.

It is a super-2 number, since 2×111100111221000² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

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, 1683302019 + ... + 1683368018.

It is an arithmetic number, because the mean of its divisors is an integer number (2954252958345).

Almost surely, 2^{111100111221000} is an apocalyptic number.

111100111221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111100111221000 is an abundant number, since it is smaller than the sum of its proper divisors (267044267447160).

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

111100111221000 is a wasteful number, since it uses less digits than its factorization.

111100111221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366670072 (or 3366670058 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111100111221000 its reverse (122111001111), we get a palindrome (111222222222111).

The spelling of 111100111221000 in words is "one hundred eleven trillion, one hundred billion, one hundred eleven million, two hundred twenty-one thousand".