11121211200 has 336 divisors, whose sum is σ = 39984297984. Its totient is φ = 2683852800.

The previous prime is 11121211163. The next prime is 11121211201. The reversal of 11121211200 is 211212111.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121211201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18321297 + ... + 18321903.

Almost surely, 2^11121211200 is an apocalyptic number.

11121211200 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 11121211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19992148992).

11121211200 is an abundant number, since it is smaller than the sum of its proper divisors (28863086784).

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

11121211200 is a wasteful number, since it uses less digits than its factorization.

11121211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11121211200 its reverse (211212111), we get a palindrome (11332423311).

The spelling of 11121211200 in words is "eleven billion, one hundred twenty-one million, two hundred eleven thousand, two hundred".