11201221020220 has 96 divisors (see below), whose sum is σ = 29391007564800. Its totient is φ = 3483649866240.

The previous prime is 11201221020191. The next prime is 11201221020221. The reversal of 11201221020220 is 2202012210211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11201221020194 and 11201221020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201221020221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7254120 + ... + 8661679.

It is an arithmetic number, because the mean of its divisors is an integer number (306156328800).

Almost surely, 2^{11201221020220} is an apocalyptic number.

11201221020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11201221020220 is an abundant number, since it is smaller than the sum of its proper divisors (18189786544580).

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

11201221020220 is a wasteful number, since it uses less digits than its factorization.

11201221020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15916283 (or 15916281 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11201221020220 its reverse (2202012210211), we get a palindrome (13403233230431).

The spelling of 11201221020220 in words is "eleven trillion, two hundred one billion, two hundred twenty-one million, twenty thousand, two hundred twenty".