2021020020220 has 24 divisors (see below), whose sum is σ = 4249793395008. Its totient is φ = 807331560000.

The previous prime is 2021020020137. The next prime is 2021020020223. The reversal of 2021020020220 is 220200201202.

It is a self number, because there is not a number n which added to its sum of digits gives 2021020020220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021020020223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67262611 + ... + 67292650.

It is an arithmetic number, because the mean of its divisors is an integer number (177074724792).

Almost surely, 2^{2021020020220} is an apocalyptic number.

2021020020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021020020220 is an abundant number, since it is smaller than the sum of its proper divisors (2228773374788).

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

2021020020220 is a wasteful number, since it uses less digits than its factorization.

2021020020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134556021 (or 134556019 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 2021020020220 its reverse (220200201202), we get a palindrome (2241220221422).

The spelling of 2021020020220 in words is "two trillion, twenty-one billion, twenty million, twenty thousand, two hundred twenty".