11011220021200 has 120 divisors (see below), whose sum is σ = 30246936224960. Its totient is φ = 3773618150400.

The previous prime is 11011220021143. The next prime is 11011220021201. The reversal of 11011220021200 is 212002211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011220021201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5524771 + ... + 7248829.

Almost surely, 2^{11011220021200} is an apocalyptic number.

11011220021200 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 11011220021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15123468112480).

11011220021200 is an abundant number, since it is smaller than the sum of its proper divisors (19235716203760).

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

11011220021200 is a wasteful number, since it uses less digits than its factorization.

11011220021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726365 (or 1726354 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11011220021200 its reverse (212002211011), we get a palindrome (11223222232211).

The spelling of 11011220021200 in words is "eleven trillion, eleven billion, two hundred twenty million, twenty-one thousand, two hundred".