201211002001 has 4 divisors (see below), whose sum is σ = 201311962852. Its totient is φ = 201110041152.

The previous prime is 201211001989. The next prime is 201211002007. The reversal of 201211002001 is 100200112102.

201211002001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100200112102 = 2 ⋅50100056051.

It can be written as a sum of positive squares in 2 ways, for example, as 157707471376 + 43503530625 = 397124^2 + 208575^2 .

It is a cyclic number.

It is not a de Polignac number, because 201211002001 - 2⁵ = 201211001969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201211002007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50477436 + ... + 50481421.

It is an arithmetic number, because the mean of its divisors is an integer number (50327990713).

Almost surely, 2^201211002001 is an apocalyptic number.

It is an amenable number.

201211002001 is a deficient number, since it is larger than the sum of its proper divisors (100960851).

201211002001 is a wasteful number, since it uses less digits than its factorization.

201211002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100960850.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201211002001 its reverse (100200112102), we get a palindrome (301411114103).

The spelling of 201211002001 in words is "two hundred one billion, two hundred eleven million, two thousand, one".