1100112112221 has 12 divisors (see below), whose sum is σ = 1515659147136. Its totient is φ = 709749747960.

The previous prime is 1100112112201. The next prime is 1100112112259. The reversal of 1100112112221 is 1222112110011.

It is a happy number.

It is not a de Polignac number, because 1100112112221 - 2⁵ = 1100112112189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1100112112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100112112201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190790061 + ... + 190795826.

It is an arithmetic number, because the mean of its divisors is an integer number (126304928928).

Almost surely, 2^{1100112112221} is an apocalyptic number.

It is an amenable number.

1100112112221 is a deficient number, since it is larger than the sum of its proper divisors (415547034915).

1100112112221 is an equidigital number, since it uses as much as digits as its factorization.

1100112112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381585952 (or 381585921 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1100112112221 its reverse (1222112110011), we get a palindrome (2322224222232).

The spelling of 1100112112221 in words is "one trillion, one hundred billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty-one".