1121001100 has 18 divisors (see below), whose sum is σ = 2432572604. Its totient is φ = 448400400.

The previous prime is 1121001047. The next prime is 1121001107. The reversal of 1121001100 is 11001211.

It is not an unprimeable number, because it can be changed into a prime (1121001107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5604906 + ... + 5605105.

Almost surely, 2^1121001100 is an apocalyptic number.

1121001100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121001100 is an abundant number, since it is smaller than the sum of its proper divisors (1311571504).

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

1121001100 is a wasteful number, since it uses less digits than its factorization.

1121001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11210025 (or 11210018 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1121001100 is about 33481.3545126239. The cubic root of 1121001100 is about 1038.8081452409.

Adding to 1121001100 its reverse (11001211), we get a palindrome (1132002311).

The spelling of 1121001100 in words is "one billion, one hundred twenty-one million, one thousand, one hundred".