20211020221120 has 112 divisors (see below), whose sum is σ = 49489356322080. Its totient is φ = 7856183844864.

The previous prime is 20211020221103. The next prime is 20211020221121. The reversal of 20211020221120 is 2112202011202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20211020221094 and 20211020221103.

It is not an unprimeable number, because it can be changed into a prime (20211020221121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8523547 + ... + 10633573.

Almost surely, 2^{20211020221120} is an apocalyptic number.

20211020221120 is a gapful number since it is divisible by the number (20) 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 20211020221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24744678161040).

20211020221120 is an abundant number, since it is smaller than the sum of its proper divisors (29278336100960).

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

20211020221120 is a wasteful number, since it uses less digits than its factorization.

20211020221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110890 (or 2110880 counting only the distinct ones).

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

Adding to 20211020221120 its reverse (2112202011202), we get a palindrome (22323222232322).

The spelling of 20211020221120 in words is "twenty trillion, two hundred eleven billion, twenty million, two hundred twenty-one thousand, one hundred twenty".