11001221122020 has 96 divisors (see below), whose sum is σ = 31088384409600. Its totient is φ = 2906620886400.

The previous prime is 11001221121967. The next prime is 11001221122033. The reversal of 11001221122020 is 2022112210011.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 31 ways as a sum of consecutive naturals, for example, 1884781 + ... + 5055179.

It is an arithmetic number, because the mean of its divisors is an integer number (323837337600).

Almost surely, 2^{11001221122020} is an apocalyptic number.

11001221122020 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 11001221122020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15544192204800).

11001221122020 is an abundant number, since it is smaller than the sum of its proper divisors (20087163287580).

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

11001221122020 is a wasteful number, since it uses less digits than its factorization.

11001221122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3170945 (or 3170943 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11001221122020 its reverse (2022112210011), we get a palindrome (13023333332031).

The spelling of 11001221122020 in words is "eleven trillion, one billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty".