2020212102221 has 4 divisors (see below), whose sum is σ = 2139048108252. Its totient is φ = 1901376096192.

The previous prime is 2020212102211. The next prime is 2020212102263. The reversal of 2020212102221 is 1222012120202.

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 746280015625 + 1273932086596 = 863875^2 + 1128686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2020212102221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 118836006013 = 2020212102221 / (2 + 0 + 2 + 0 + 2 + 1 + 2 + 1 + 0 + 2 + 2 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2020212102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020212102211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59418002990 + ... + 59418003023.

It is an arithmetic number, because the mean of its divisors is an integer number (534762027063).

Almost surely, 2^{2020212102221} is an apocalyptic number.

It is an amenable number.

2020212102221 is a deficient number, since it is larger than the sum of its proper divisors (118836006031).

2020212102221 is a wasteful number, since it uses less digits than its factorization.

2020212102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118836006030.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2020212102221 its reverse (1222012120202), we get a palindrome (3242224222423).

The spelling of 2020212102221 in words is "two trillion, twenty billion, two hundred twelve million, one hundred two thousand, two hundred twenty-one".