1121110002100 has 72 divisors (see below), whose sum is σ = 2710440770688. Its totient is φ = 399002380800.

The previous prime is 1121110001983. The next prime is 1121110002101. The reversal of 1121110002100 is 12000111211.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121110002101) 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 23 ways as a sum of consecutive naturals, for example, 10790757 + ... + 10894156.

It is an arithmetic number, because the mean of its divisors is an integer number (37645010704).

Almost surely, 2^{1121110002100} is an apocalyptic number.

1121110002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121110002100 is an abundant number, since it is smaller than the sum of its proper divisors (1589330768588).

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

1121110002100 is a wasteful number, since it uses less digits than its factorization.

1121110002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21684985 (or 21684978 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1121110002100 its reverse (12000111211), we get a palindrome (1133110113311).

The spelling of 1121110002100 in words is "one trillion, one hundred twenty-one billion, one hundred ten million, two thousand, one hundred".