200120020021001 has 2 divisors, whose sum is σ = 200120020021002. Its totient is φ = 200120020021000.

The previous prime is 200120020020989. The next prime is 200120020021063. The reversal of 200120020021001 is 100120020021002.

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., 196519043175625 + 3600976845376 = 14018525^2 + 1897624^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120020021001 - 2¹⁰ = 200120020019977 is a prime.

It is not a weakly prime, because it can be changed into another prime (100120020021001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060010010500 + 100060010010501.

It is an arithmetic number, because the mean of its divisors is an integer number (100060010010501).

Almost surely, 2^{200120020021001} is an apocalyptic number.

It is an amenable number.

200120020021001 is a deficient number, since it is larger than the sum of its proper divisors (1).

200120020021001 is an equidigital number, since it uses as much as digits as its factorization.

200120020021001 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 200120020021001 its reverse (100120020021002), we get a palindrome (300240040042003).

Subtracting from 200120020021001 its reverse (100120020021002), we obtain a palindrome (99999999999999).

The spelling of 200120020021001 in words is "two hundred trillion, one hundred twenty billion, twenty million, twenty-one thousand, one".