1021011200221 has 2 divisors, whose sum is σ = 1021011200222. Its totient is φ = 1021011200220.

The previous prime is 1021011200203. The next prime is 1021011200299. The reversal of 1021011200221 is 1220021101201.

1021011200221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 797859832900 + 223151367321 = 893230^2 + 472389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021011200221 - 2¹⁷ = 1021011069149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021011200201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510505600110 + 510505600111.

It is an arithmetic number, because the mean of its divisors is an integer number (510505600111).

Almost surely, 2^{1021011200221} is an apocalyptic number.

It is an amenable number.

1021011200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021011200221 is an equidigital number, since it uses as much as digits as its factorization.

1021011200221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021011200221 its reverse (1220021101201), we get a palindrome (2241032301422).

The spelling of 1021011200221 in words is "one trillion, twenty-one billion, eleven million, two hundred thousand, two hundred twenty-one".