1121320200 has 384 divisors, whose sum is σ = 4669701120. Its totient is φ = 214963200.

The previous prime is 1121320199. The next prime is 1121320237. The reversal of 1121320200 is 20231211.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 599667 + ... + 601533.

It is an arithmetic number, because the mean of its divisors is an integer number (12160680).

Almost surely, 2^1121320200 is an apocalyptic number.

1121320200 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 1121320200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2334850560).

1121320200 is an abundant number, since it is smaller than the sum of its proper divisors (3548380920).

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

1121320200 is a wasteful number, since it uses less digits than its factorization.

1121320200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917 (or 1908 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1121320200 is about 33486.1195124189. The cubic root of 1121320200 is about 1038.9067036429.

Adding to 1121320200 its reverse (20231211), we get a palindrome (1141551411).

It can be divided in two parts, 11213 and 20200, that added together give a palindrome (31413).

The spelling of 1121320200 in words is "one billion, one hundred twenty-one million, three hundred twenty thousand, two hundred".