1121165200 has 60 divisors (see below), whose sum is σ = 2739311280. Its totient is φ = 440855680.

The previous prime is 1121165191. The next prime is 1121165209. The reversal of 1121165200 is 25611211.

It is an interprime number because it is at equal distance from previous prime (1121165191) and next prime (1121165209).

It is a super-2 number, since 2×1121165200² = 2514022811382080000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121165209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154 + ... + 47353.

It is an arithmetic number, because the mean of its divisors is an integer number (45655188).

Almost surely, 2^1121165200 is an apocalyptic number.

1121165200 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 1121165200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1369655640).

1121165200 is an abundant number, since it is smaller than the sum of its proper divisors (1618146080).

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

1121165200 is a wasteful number, since it uses less digits than its factorization.

1121165200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47584 (or 47573 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1121165200 is about 33483.8050406461. The cubic root of 1121165200 is about 1038.8588321073.

Adding to 1121165200 its reverse (25611211), we get a palindrome (1146776411).

The spelling of 1121165200 in words is "one billion, one hundred twenty-one million, one hundred sixty-five thousand, two hundred".