2102000221 has 2 divisors, whose sum is σ = 2102000222. Its totient is φ = 2102000220.

The previous prime is 2102000209. The next prime is 2102000231. The reversal of 2102000221 is 1220002012.

It is an a-pointer prime, because the next prime (2102000231) can be obtained adding 2102000221 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2101764025 + 236196 = 45845^2 + 486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102000221 - 2¹⁷ = 2101869149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102000198 and 2102000207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102000231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051000110 + 1051000111.

It is an arithmetic number, because the mean of its divisors is an integer number (1051000111).

Almost surely, 2^2102000221 is an apocalyptic number.

It is an amenable number.

2102000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102000221 is an equidigital number, since it uses as much as digits as its factorization.

2102000221 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 10.

The square root of 2102000221 is about 45847.5759555508. The cubic root of 2102000221 is about 1280.9856139593.

Adding to 2102000221 its reverse (1220002012), we get a palindrome (3322002233).

The spelling of 2102000221 in words is "two billion, one hundred two million, two hundred twenty-one", and thus it is an aban number.