1100331012 has 72 divisors (see below), whose sum is σ = 2879059680. Its totient is φ = 324368640.

The previous prime is 1100331007. The next prime is 1100331047. The reversal of 1100331012 is 2101330011.

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

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 177664 + ... + 183752.

It is an arithmetic number, because the mean of its divisors is an integer number (39986940).

Almost surely, 2^1100331012 is an apocalyptic number.

1100331012 is a gapful number since it is divisible by the number (12) 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 1100331012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439529840).

1100331012 is an abundant number, since it is smaller than the sum of its proper divisors (1778728668).

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

1100331012 is a wasteful number, since it uses less digits than its factorization.

1100331012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6181 (or 6142 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1100331012 is about 33171.2377218578. The cubic root of 1100331012 is about 1032.3836496493.

Adding to 1100331012 its reverse (2101330011), we get a palindrome (3201661023).

The spelling of 1100331012 in words is "one billion, one hundred million, three hundred thirty-one thousand, twelve".