2021120200240 has 80 divisors (see below), whose sum is σ = 4815427480416. Its totient is φ = 788449536000.

The previous prime is 2021120200219. The next prime is 2021120200241. The reversal of 2021120200240 is 420020211202.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is not an unprimeable number, because it can be changed into a prime (2021120200241) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9243214 + ... + 9459346.

Almost surely, 2^{2021120200240} is an apocalyptic number.

2021120200240 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 2021120200240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2407713740208).

2021120200240 is an abundant number, since it is smaller than the sum of its proper divisors (2794307280176).

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

2021120200240 is a wasteful number, since it uses less digits than its factorization.

2021120200240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219038 (or 219032 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2021120200240 its reverse (420020211202), we get a palindrome (2441140411442).

The spelling of 2021120200240 in words is "two trillion, twenty-one billion, one hundred twenty million, two hundred thousand, two hundred forty".