2001013201 has 4 divisors (see below), whose sum is σ = 2182923504. Its totient is φ = 1819102900.

The previous prime is 2001013187. The next prime is 2001013207. The reversal of 2001013201 is 1023101002.

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 2001013201 - 2¹¹ = 2001011153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001013207) 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, 90955135 + ... + 90955156.

It is an arithmetic number, because the mean of its divisors is an integer number (545730876).

Almost surely, 2^2001013201 is an apocalyptic number.

It is an amenable number.

2001013201 is a deficient number, since it is larger than the sum of its proper divisors (181910303).

2001013201 is a wasteful number, since it uses less digits than its factorization.

2001013201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181910302.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2001013201 is about 44732.6860472295. The cubic root of 2001013201 is about 1260.1337728550.

Adding to 2001013201 its reverse (1023101002), we get a palindrome (3024114203).

It can be divided in two parts, 200101 and 3201, that added together give a palindrome (203302).

The spelling of 2001013201 in words is "two billion, one million, thirteen thousand, two hundred one".