201010001001 has 4 divisors (see below), whose sum is σ = 268013334672. Its totient is φ = 134006667332.

The previous prime is 201010000943. The next prime is 201010001029. The reversal of 201010001001 is 100100010102.

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 201010001001 - 2⁹ = 201010000489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201010001081) 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, 33501666831 + ... + 33501666836.

It is an arithmetic number, because the mean of its divisors is an integer number (67003333668).

Almost surely, 2^201010001001 is an apocalyptic number.

It is an amenable number.

201010001001 is a deficient number, since it is larger than the sum of its proper divisors (67003333671).

201010001001 is an equidigital number, since it uses as much as digits as its factorization.

201010001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67003333670.

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 201010001001 its reverse (100100010102), we get a palindrome (301110011103).

The spelling of 201010001001 in words is "two hundred one billion, ten million, one thousand, one".