200120100001 has 2 divisors, whose sum is σ = 200120100002. Its totient is φ = 200120100000.

The previous prime is 200120099983. The next prime is 200120100053. The reversal of 200120100001 is 100001021002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177935486976 + 22184613025 = 421824^2 + 148945^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120100001 - 2⁹ = 200120099489 is a prime.

It is not a weakly prime, because it can be changed into another prime (200120100101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060050000 + 100060050001.

It is an arithmetic number, because the mean of its divisors is an integer number (100060050001).

Almost surely, 2^200120100001 is an apocalyptic number.

It is an amenable number.

200120100001 is a deficient number, since it is larger than the sum of its proper divisors (1).

200120100001 is an equidigital number, since it uses as much as digits as its factorization.

200120100001 is an evil number, because the sum of its binary digits is even.

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

Adding to 200120100001 its reverse (100001021002), we get a palindrome (300121121003).

The spelling of 200120100001 in words is "two hundred billion, one hundred twenty million, one hundred thousand, one".