11011212201220 has 192 divisors, whose sum is σ = 28882324348416. Its totient is φ = 3425767096320.

The previous prime is 11011212201217. The next prime is 11011212201281. The reversal of 11011212201220 is 2210221211011.

It is a junction number, because it is equal to n+sod(n) for n = 11011212201194 and 11011212201203.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 2470541232 + ... + 2470545688.

It is an arithmetic number, because the mean of its divisors is an integer number (150428772648).

Almost surely, 2^{11011212201220} is an apocalyptic number.

11011212201220 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 11011212201220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14441162174208).

11011212201220 is an abundant number, since it is smaller than the sum of its proper divisors (17871112147196).

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

11011212201220 is a wasteful number, since it uses less digits than its factorization.

11011212201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7070 (or 7068 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11011212201220 its reverse (2210221211011), we get a palindrome (13221433412231).

The spelling of 11011212201220 in words is "eleven trillion, eleven billion, two hundred twelve million, two hundred one thousand, two hundred twenty".