2020421221 has 32 divisors (see below), whose sum is σ = 2624303360. Its totient is φ = 1510534656.

The previous prime is 2020421209. The next prime is 2020421239. The reversal of 2020421221 is 1221240202.

It is not a de Polignac number, because 2020421221 - 2²¹ = 2018324069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2020421195 and 2020421204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020421281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 788875 + ... + 791431.

It is an arithmetic number, because the mean of its divisors is an integer number (82009480).

Almost surely, 2^2020421221 is an apocalyptic number.

It is an amenable number.

2020421221 is a deficient number, since it is larger than the sum of its proper divisors (603882139).

2020421221 is a wasteful number, since it uses less digits than its factorization.

2020421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3053.

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

The square root of 2020421221 is about 44949.0958863468. The cubic root of 2020421221 is about 1264.1947248222.

Adding to 2020421221 its reverse (1221240202), we get a palindrome (3241661423).

The spelling of 2020421221 in words is "two billion, twenty million, four hundred twenty-one thousand, two hundred twenty-one".