2100001220201 has 2 divisors, whose sum is σ = 2100001220202. Its totient is φ = 2100001220200.

The previous prime is 2100001220179. The next prime is 2100001220227. The reversal of 2100001220201 is 1020221000012.

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., 1889866076176 + 210135144025 = 1374724^2 + 458405^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100001220201 - 2⁶ = 2100001220137 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100001220101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050000610100 + 1050000610101.

It is an arithmetic number, because the mean of its divisors is an integer number (1050000610101).

Almost surely, 2^{2100001220201} is an apocalyptic number.

It is an amenable number.

2100001220201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100001220201 is an equidigital number, since it uses as much as digits as its factorization.

2100001220201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2100001220201 its reverse (1020221000012), we get a palindrome (3120222220213).

The spelling of 2100001220201 in words is "two trillion, one hundred billion, one million, two hundred twenty thousand, two hundred one".