2020202011221 has 4 divisors (see below), whose sum is σ = 2693602681632. Its totient is φ = 1346801340812.

The previous prime is 2020202011199. The next prime is 2020202011237. The reversal of 2020202011221 is 1221102020202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2020202011221 - 2⁵ = 2020202011189 is a prime.

It is a super-2 number, since 2×2020202011221² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2020202011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020202011621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336700335201 + ... + 336700335206.

It is an arithmetic number, because the mean of its divisors is an integer number (673400670408).

Almost surely, 2^{2020202011221} is an apocalyptic number.

It is an amenable number.

2020202011221 is a deficient number, since it is larger than the sum of its proper divisors (673400670411).

2020202011221 is an equidigital number, since it uses as much as digits as its factorization.

2020202011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673400670410.

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

Adding to 2020202011221 its reverse (1221102020202), we get a palindrome (3241304031423).

The spelling of 2020202011221 in words is "two trillion, twenty billion, two hundred two million, eleven thousand, two hundred twenty-one".