2021102210220 has 192 divisors, whose sum is σ = 6127269636096. Its totient is φ = 496422051840.

The previous prime is 2021102210213. The next prime is 2021102210233. The reversal of 2021102210220 is 220122011202.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2021102210220.

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 63 ways as a sum of consecutive naturals, for example, 4748785 + ... + 5156855.

It is an arithmetic number, because the mean of its divisors is an integer number (31912862688).

Almost surely, 2^{2021102210220} is an apocalyptic number.

2021102210220 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 2021102210220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3063634818048).

2021102210220 is an abundant number, since it is smaller than the sum of its proper divisors (4106167425876).

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

2021102210220 is a wasteful number, since it uses less digits than its factorization.

2021102210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408240 (or 408238 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2021102210220 its reverse (220122011202), we get a palindrome (2241224221422).

It can be divided in two parts, 2021102 and 210220, that added together give a palindrome (2231322).

The spelling of 2021102210220 in words is "two trillion, twenty-one billion, one hundred two million, two hundred ten thousand, two hundred twenty".