1100000000000 has 288 divisors, whose sum is σ = 2999267565840. Its totient is φ = 400000000000.

The previous prime is 1099999999999. The next prime is 1100000000003. The reversal of 1100000000000 is 11.

It is a sliding number, since 1100000000000 = 100000000000 + 1000000000000 and 1/100000000000 + 1/1000000000000 = 0.00000000001100000000000.

It is an ABA number since it can be written as A⋅B^A, here for A=11, B=10.

It is a Harshad number since it is a multiple of its sum of digits (2).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100000000003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99999999995 + ... + 100000000005.

Almost surely, 2^{1100000000000} is an apocalyptic number.

1100000000000 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 1100000000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1499633782920).

1100000000000 is an abundant number, since it is smaller than the sum of its proper divisors (1899267565840).

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

1100000000000 is an frugal number, since it uses more digits than its factorization.

1100000000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 2.

Adding to 1100000000000 its reverse (11), we get a palindrome (1100000000011).

1100000000000 divided by its reverse (11) gives a 11-th power (100000000000 = 10¹¹).

It can be divided in two parts, 1 and 100000000000, that added together give a palindrome (100000000001).

The spelling of 1100000000000 in words is "one trillion, one hundred billion", and thus it is an aban number.