1100120000 has 140 divisors (see below), whose sum is σ = 3118439280. Its totient is φ = 377088000.

The previous prime is 1100119957. The next prime is 1100120003. The reversal of 1100120000 is 210011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (140).

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100120003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 278036 + ... + 281964.

Almost surely, 2^1100120000 is an apocalyptic number.

1100120000 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 1100120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1559219640).

1100120000 is an abundant number, since it is smaller than the sum of its proper divisors (2018319280).

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

1100120000 is an frugal number, since it uses more digits than its factorization.

1100120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3968 (or 3943 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1100120000 is about 33168.0569222859. The cubic root of 1100120000 is about 1032.3176515502.

Adding to 1100120000 its reverse (210011), we get a palindrome (1100330011).

The spelling of 1100120000 in words is "one billion, one hundred million, one hundred twenty thousand".