1121121110100 has 144 divisors (see below), whose sum is σ = 3353739124736. Its totient is φ = 288861552000.

The previous prime is 1121121109993. The next prime is 1121121110107. The reversal of 1121121110100 is 10111211211.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121121110107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5772777 + ... + 5963823.

Almost surely, 2^{1121121110100} is an apocalyptic number.

1121121110100 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 1121121110100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1676869562368).

1121121110100 is an abundant number, since it is smaller than the sum of its proper divisors (2232618014636).

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

1121121110100 is a wasteful number, since it uses less digits than its factorization.

1121121110100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191726 (or 191719 counting only the distinct ones).

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

Adding to 1121121110100 its reverse (10111211211), we get a palindrome (1131232321311).

The spelling of 1121121110100 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred ten thousand, one hundred".