201211001 has 8 divisors (see below), whose sum is σ = 204748800. Its totient is φ = 197681040.

The previous prime is 201210967. The next prime is 201211009. The reversal of 201211001 is 100112102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201211001 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 201211001.

It is not an unprimeable number, because it can be changed into a prime (201211009) 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 7 ways as a sum of consecutive naturals, for example, 76730 + ... + 79308.

It is an arithmetic number, because the mean of its divisors is an integer number (25593600).

Almost surely, 2^201211001 is an apocalyptic number.

It is an amenable number.

201211001 is a deficient number, since it is larger than the sum of its proper divisors (3537799).

201211001 is a wasteful number, since it uses less digits than its factorization.

201211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3919.

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

The square root of 201211001 is about 14184.8863583745. The cubic root of 201211001 is about 585.9815027922.

Adding to 201211001 its reverse (100112102), we get a palindrome (301323103).

The spelling of 201211001 in words is "two hundred one million, two hundred eleven thousand, one".