201020101001 has 4 divisors (see below), whose sum is σ = 201027360000. Its totient is φ = 201012842004.

The previous prime is 201020100839. The next prime is 201020101019. The reversal of 201020101001 is 100101020102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201020101001 - 2¹⁸ = 201019838857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201020101001.

It is not an unprimeable number, because it can be changed into a prime (201020101021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3587801 + ... + 3643398.

It is an arithmetic number, because the mean of its divisors is an integer number (50256840000).

Almost surely, 2^201020101001 is an apocalyptic number.

It is an amenable number.

201020101001 is a deficient number, since it is larger than the sum of its proper divisors (7258999).

201020101001 is an equidigital number, since it uses as much as digits as its factorization.

201020101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7258998.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 201020101001 its reverse (100101020102), we get a palindrome (301121121103).

The spelling of 201020101001 in words is "two hundred one billion, twenty million, one hundred one thousand, one".