1112221211100 has 72 divisors (see below), whose sum is σ = 3218978638848. Its totient is φ = 296504587200.

The previous prime is 1112221211083. The next prime is 1112221211161. The reversal of 1112221211100 is 11121222111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1112221211100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 470647 + ... + 1563953.

Almost surely, 2^{1112221211100} is an apocalyptic number.

1112221211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1112221211100 is an abundant number, since it is smaller than the sum of its proper divisors (2106757427748).

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

1112221211100 is a wasteful number, since it uses less digits than its factorization.

1112221211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096715 (or 1096708 counting only the distinct ones).

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

Adding to 1112221211100 its reverse (11121222111), we get a palindrome (1123342433211).

The spelling of 1112221211100 in words is "one trillion, one hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, one hundred".