1101200000 has 96 divisors (see below), whose sum is σ = 2743066620. Its totient is φ = 440320000.

The previous prime is 1101199997. The next prime is 1101200033. The reversal of 1101200000 is 21011.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 10086976 + 1091113024 = 3176^2 + 33032^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 398624 + ... + 401376.

Almost surely, 2^1101200000 is an apocalyptic number.

1101200000 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 1101200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1371533310).

1101200000 is an abundant number, since it is smaller than the sum of its proper divisors (1641866620).

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

1101200000 is an frugal number, since it uses more digits than its factorization.

1101200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792 (or 2760 counting only the distinct ones).

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

The square root of 1101200000 is about 33184.3336530960. Note that the first 3 decimals coincide. The cubic root of 1101200000 is about 1032.6553536266.

Adding to 1101200000 its reverse (21011), we get a palindrome (1101221011).

The spelling of 1101200000 in words is "one billion, one hundred one million, two hundred thousand".