1100111221212 has 48 divisors (see below), whose sum is σ = 2593618339872. Its totient is φ = 362891243520.

The previous prime is 1100111221189. The next prime is 1100111221241. The reversal of 1100111221212 is 2121221110011.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1100111221191 and 1100111221200.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15694162 + ... + 15764102.

It is an arithmetic number, because the mean of its divisors is an integer number (54033715414).

Almost surely, 2^{1100111221212} is an apocalyptic number.

1100111221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1100111221212 is an abundant number, since it is smaller than the sum of its proper divisors (1493507118660).

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

1100111221212 is a wasteful number, since it uses less digits than its factorization.

1100111221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83558 (or 83556 counting only the distinct ones).

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

Adding to 1100111221212 its reverse (2121221110011), we get a palindrome (3221332331223).

The spelling of 1100111221212 in words is "one trillion, one hundred billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twelve".