1012002000221 has 2 divisors, whose sum is σ = 1012002000222. Its totient is φ = 1012002000220.

The previous prime is 1012002000209. The next prime is 1012002000253. The reversal of 1012002000221 is 1220002002101.

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., 668739595225 + 343262404996 = 817765^2 + 585886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012002000221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012002020221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506001000110 + 506001000111.

It is an arithmetic number, because the mean of its divisors is an integer number (506001000111).

Almost surely, 2^{1012002000221} is an apocalyptic number.

It is an amenable number.

1012002000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012002000221 is an equidigital number, since it uses as much as digits as its factorization.

1012002000221 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 11.

Adding to 1012002000221 its reverse (1220002002101), we get a palindrome (2232004002322).

The spelling of 1012002000221 in words is "one trillion, twelve billion, two million, two hundred twenty-one", and thus it is an aban number.