11020221201220 has 96 divisors (see below), whose sum is σ = 28868777312256. Its totient is φ = 3432989078400.

The previous prime is 11020221201203. The next prime is 11020221201239. The reversal of 11020221201220 is 2210212202011.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11020221201194 and 11020221201203.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 844725 + ... + 4770115.

It is an arithmetic number, because the mean of its divisors is an integer number (300716430336).

Almost surely, 2^{11020221201220} is an apocalyptic number.

11020221201220 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 11020221201220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14434388656128).

11020221201220 is an abundant number, since it is smaller than the sum of its proper divisors (17848556111036).

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

11020221201220 is a wasteful number, since it uses less digits than its factorization.

11020221201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927241 (or 3927239 counting only the distinct ones).

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

Adding to 11020221201220 its reverse (2210212202011), we get a palindrome (13230433403231).

The spelling of 11020221201220 in words is "eleven trillion, twenty billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty".