11201220212020 has 24 divisors (see below), whose sum is σ = 23625281068200. Its totient is φ = 4460922632832.

The previous prime is 11201220212009. The next prime is 11201220212071. The reversal of 11201220212020 is 2021202210211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1647161762724 + 9554058449296 = 1283418^2 + 3090964^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11201220211985 and 11201220212003.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1222836055 + ... + 1222845214.

It is an arithmetic number, because the mean of its divisors is an integer number (984386711175).

Almost surely, 2^{11201220212020} is an apocalyptic number.

11201220212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11201220212020 is an abundant number, since it is smaller than the sum of its proper divisors (12424060856180).

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

11201220212020 is a wasteful number, since it uses less digits than its factorization.

11201220212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445681507 (or 2445681505 counting only the distinct ones).

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

Adding to 11201220212020 its reverse (2021202210211), we get a palindrome (13222422422231).

The spelling of 11201220212020 in words is "eleven trillion, two hundred one billion, two hundred twenty million, two hundred twelve thousand, twenty".