2021201012221 has 2 divisors, whose sum is σ = 2021201012222. Its totient is φ = 2021201012220.

The previous prime is 2021201012197. The next prime is 2021201012249. The reversal of 2021201012221 is 1222101021202.

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., 1907133380100 + 114067632121 = 1380990^2 + 337739^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021201012221 - 2⁷ = 2021201012093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021201012195 and 2021201012204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021201712221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010600506110 + 1010600506111.

It is an arithmetic number, because the mean of its divisors is an integer number (1010600506111).

Almost surely, 2^{2021201012221} is an apocalyptic number.

It is an amenable number.

2021201012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021201012221 is an equidigital number, since it uses as much as digits as its factorization.

2021201012221 is an evil number, because the sum of its binary digits is even.

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

Adding to 2021201012221 its reverse (1222101021202), we get a palindrome (3243302033423).

The spelling of 2021201012221 in words is "two trillion, twenty-one billion, two hundred one million, twelve thousand, two hundred twenty-one".