2020020221221 has 16 divisors (see below), whose sum is σ = 2111618386944. Its totient is φ = 1930475829744.

The previous prime is 2020020221129. The next prime is 2020020221227. The reversal of 2020020221221 is 1221220200202.

It is a cyclic number.

It is not a de Polignac number, because 2020020221221 - 2³⁹ = 1470264407333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020020221195 and 2020020221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020020221227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6565390 + ... + 6866176.

It is an arithmetic number, because the mean of its divisors is an integer number (131976149184).

Almost surely, 2^{2020020221221} is an apocalyptic number.

It is an amenable number.

2020020221221 is a deficient number, since it is larger than the sum of its proper divisors (91598165723).

2020020221221 is a wasteful number, since it uses less digits than its factorization.

2020020221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304200.

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

Adding to 2020020221221 its reverse (1221220200202), we get a palindrome (3241240421423).

The spelling of 2020020221221 in words is "two trillion, twenty billion, twenty million, two hundred twenty-one thousand, two hundred twenty-one".