11011221200 has 90 divisors (see below), whose sum is σ = 30773609046. Its totient is φ = 3775269120.

The previous prime is 11011221191. The next prime is 11011221229. The reversal of 11011221200 is 212211011.

It can be written as a sum of positive squares in 3 ways, for example, as 359329936 + 10651891264 = 18956^2 + 103208^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 261299 + ... + 300498.

Almost surely, 2^11011221200 is an apocalyptic number.

11011221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011221200 is an abundant number, since it is smaller than the sum of its proper divisors (19762387846).

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

11011221200 is a wasteful number, since it uses less digits than its factorization.

11011221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561829 (or 561811 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11011221200 its reverse (212211011), we get a palindrome (11223432211).

The spelling of 11011221200 in words is "eleven billion, eleven million, two hundred twenty-one thousand, two hundred".