11211242400 has 432 divisors, whose sum is σ = 41476282848. Its totient is φ = 2954880000.

The previous prime is 11211242377. The next prime is 11211242401. The reversal of 11211242400 is 424211211.

11211242400 is a `hidden beast` number, since 1 + 1 + 21 + 1 + 242 + 400 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11211242401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19634115 + ... + 19634685.

It is an arithmetic number, because the mean of its divisors is an integer number (96009914).

Almost surely, 2^11211242400 is an apocalyptic number.

11211242400 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 11211242400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20738141424).

11211242400 is an abundant number, since it is smaller than the sum of its proper divisors (30265040448).

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

11211242400 is a wasteful number, since it uses less digits than its factorization.

11211242400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11211242400 its reverse (424211211), we get a palindrome (11635453611).

The spelling of 11211242400 in words is "eleven billion, two hundred eleven million, two hundred forty-two thousand, four hundred".