2021001102220 has 192 divisors, whose sum is σ = 4618315699200. Its totient is φ = 740589696000.

The previous prime is 2021001102163. The next prime is 2021001102223. The reversal of 2021001102220 is 222011001202.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021001102220.

It is not an unprimeable number, because it can be changed into a prime (2021001102223) 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 63 ways as a sum of consecutive naturals, for example, 927489091 + ... + 927491269.

It is an arithmetic number, because the mean of its divisors is an integer number (24053727600).

Almost surely, 2^{2021001102220} is an apocalyptic number.

2021001102220 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 2021001102220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2309157849600).

2021001102220 is an abundant number, since it is smaller than the sum of its proper divisors (2597314596980).

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

2021001102220 is a wasteful number, since it uses less digits than its factorization.

2021001102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768 (or 2766 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2021001102220 its reverse (222011001202), we get a palindrome (2243012103422).

The spelling of 2021001102220 in words is "two trillion, twenty-one billion, one million, one hundred two thousand, two hundred twenty".