1121200112100 has 144 divisors (see below), whose sum is σ = 3255975632000. Its totient is φ = 297884805120.

The previous prime is 1121200112069. The next prime is 1121200112113. The reversal of 1121200112100 is 12110021211.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 180864801 + ... + 180870999.

Almost surely, 2^{1121200112100} is an apocalyptic number.

1121200112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121200112100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1627987816000).

1121200112100 is an abundant number, since it is smaller than the sum of its proper divisors (2134775519900).

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

1121200112100 is a wasteful number, since it uses less digits than its factorization.

1121200112100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8342 (or 8335 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1121200112100 its reverse (12110021211), we get a palindrome (1133310133311).

The spelling of 1121200112100 in words is "one trillion, one hundred twenty-one billion, two hundred million, one hundred twelve thousand, one hundred".