11212201728 has 432 divisors, whose sum is σ = 40578632640. Its totient is φ = 2898395136.

The previous prime is 11212201727. The next prime is 11212201729. The reversal of 11212201728 is 82710221211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11212201727) and next prime (11212201729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212201727) 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, 11111688 + ... + 11112696.

It is an arithmetic number, because the mean of its divisors is an integer number (93932020).

Almost surely, 2^11212201728 is an apocalyptic number.

11212201728 is a gapful number since it is divisible by the number (18) 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 11212201728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20289316320).

11212201728 is an abundant number, since it is smaller than the sum of its proper divisors (29366430912).

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

11212201728 is a wasteful number, since it uses less digits than its factorization.

11212201728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104 (or 1087 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

Adding to 11212201728 its reverse (82710221211), we get a palindrome (93922422939).

The spelling of 11212201728 in words is "eleven billion, two hundred twelve million, two hundred one thousand, seven hundred twenty-eight".