20210310200221 has 2 divisors, whose sum is σ = 20210310200222. Its totient is φ = 20210310200220.

The previous prime is 20210310200219. The next prime is 20210310200257. The reversal of 20210310200221 is 12200201301202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18372281964100 + 1838028236121 = 4286290^2 + 1355739^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210310200221 - 2¹ = 20210310200219 is a prime.

Together with 20210310200219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20210310200195 and 20210310200204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210310203221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105155100110 + 10105155100111.

It is an arithmetic number, because the mean of its divisors is an integer number (10105155100111).

Almost surely, 2^{20210310200221} is an apocalyptic number.

It is an amenable number.

20210310200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210310200221 is an equidigital number, since it uses as much as digits as its factorization.

20210310200221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20210310200221 its reverse (12200201301202), we get a palindrome (32410511501423).

The spelling of 20210310200221 in words is "twenty trillion, two hundred ten billion, three hundred ten million, two hundred thousand, two hundred twenty-one".