2021201110020 has 72 divisors (see below), whose sum is σ = 5700374132544. Its totient is φ = 535109051712.

The previous prime is 2021201110007. The next prime is 2021201110037. The reversal of 2021201110020 is 200111021202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2021201109978 and 2021201110005.

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 23 ways as a sum of consecutive naturals, for example, 287497 + ... + 2031023.

It is an arithmetic number, because the mean of its divisors is an integer number (79171862952).

Almost surely, 2^{2021201110020} is an apocalyptic number.

2021201110020 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 2021201110020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2850187066272).

2021201110020 is an abundant number, since it is smaller than the sum of its proper divisors (3679173022524).

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

2021201110020 is a wasteful number, since it uses less digits than its factorization.

2021201110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743817 (or 1743676 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2021201110020 its reverse (200111021202), we get a palindrome (2221312131222).

The spelling of 2021201110020 in words is "two trillion, twenty-one billion, two hundred one million, one hundred ten thousand, twenty".