11011012001220 has 384 divisors, whose sum is σ = 39345177231360. Its totient is φ = 2234064913920.

The previous prime is 11011012001191. The next prime is 11011012001299. The reversal of 11011012001220 is 2210021011011.

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

It is a junction number, because it is equal to n+sod(n) for n = 11011012001196 and 11011012001205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 778541469 + ... + 778555611.

It is an arithmetic number, because the mean of its divisors is an integer number (102461399040).

Almost surely, 2^{11011012001220} is an apocalyptic number.

11011012001220 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 11011012001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19672588615680).

11011012001220 is an abundant number, since it is smaller than the sum of its proper divisors (28334165230140).

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

11011012001220 is a wasteful number, since it uses less digits than its factorization.

11011012001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18135 (or 18133 counting only the distinct ones).

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

Adding to 11011012001220 its reverse (2210021011011), we get a palindrome (13221033012231).

The spelling of 11011012001220 in words is "eleven trillion, eleven billion, twelve million, one thousand, two hundred twenty".