200021001001 has 2 divisors, whose sum is σ = 200021001002. Its totient is φ = 200021001000.

The previous prime is 200021000981. The next prime is 200021001007. The reversal of 200021001001 is 100100120002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137270250000 + 62750751001 = 370500^2 + 250501^2 .

It is a cyclic number.

It is not a de Polignac number, because 200021001001 - 2⁵ = 200021000969 is a prime.

It is not a weakly prime, because it can be changed into another prime (200021001007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010500500 + 100010500501.

It is an arithmetic number, because the mean of its divisors is an integer number (100010500501).

Almost surely, 2^200021001001 is an apocalyptic number.

It is an amenable number.

200021001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

200021001001 is an equidigital number, since it uses as much as digits as its factorization.

200021001001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 200021001001 its reverse (100100120002), we get a palindrome (300121121003).

It can be divided in two parts, 20002 and 1001001, that multiplied together give a palindrome (20022022002).

The spelling of 200021001001 in words is "two hundred billion, twenty-one million, one thousand, one".