2020102112221 has 4 divisors (see below), whose sum is σ = 2138931648252. Its totient is φ = 1901272576192.

The previous prime is 2020102112213. The next prime is 2020102112233. The reversal of 2020102112221 is 1222112010202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 803523996025 + 1216578116196 = 896395^2 + 1102986^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020102112221 - 2³ = 2020102112213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020102112195 and 2020102112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020102112201) 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, 59414767990 + ... + 59414768023.

It is an arithmetic number, because the mean of its divisors is an integer number (534732912063).

Almost surely, 2^{2020102112221} is an apocalyptic number.

It is an amenable number.

2020102112221 is a deficient number, since it is larger than the sum of its proper divisors (118829536031).

2020102112221 is a wasteful number, since it uses less digits than its factorization.

2020102112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118829536030.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2020102112221 its reverse (1222112010202), we get a palindrome (3242214122423).

The spelling of 2020102112221 in words is "two trillion, twenty billion, one hundred two million, one hundred twelve thousand, two hundred twenty-one".