200020111001 has 2 divisors, whose sum is σ = 200020111002. Its totient is φ = 200020111000.

The previous prime is 200020110991. The next prime is 200020111103. The reversal of 200020111001 is 100111020002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199876949776 + 143161225 = 447076^2 + 11965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200020111001 is a prime.

It is a super-2 number, since 2×200020111001² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 200020111001.

It is not a weakly prime, because it can be changed into another prime (200029111001) 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, 100010055500 + 100010055501.

It is an arithmetic number, because the mean of its divisors is an integer number (100010055501).

Almost surely, 2^200020111001 is an apocalyptic number.

It is an amenable number.

200020111001 is a deficient number, since it is larger than the sum of its proper divisors (1).

200020111001 is an equidigital number, since it uses as much as digits as its factorization.

200020111001 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 8.

Adding to 200020111001 its reverse (100111020002), we get a palindrome (300131131003).

Subtracting from 200020111001 its reverse (100111020002), we obtain a palindrome (99909090999).

The spelling of 200020111001 in words is "two hundred billion, twenty million, one hundred eleven thousand, one".