2001325121 has 4 divisors (see below), whose sum is σ = 2016602544. Its totient is φ = 1986047700.

The previous prime is 2001325097. The next prime is 2001325127. The reversal of 2001325121 is 1215231002.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1215231002 = 2 ⋅607615501.

It is a cyclic number.

It is not a de Polignac number, because 2001325121 - 2⁶ = 2001325057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001325121.

It is not an unprimeable number, because it can be changed into a prime (2001325127) 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, 7638515 + ... + 7638776.

It is an arithmetic number, because the mean of its divisors is an integer number (504150636).

Almost surely, 2^2001325121 is an apocalyptic number.

It is an amenable number.

2001325121 is a deficient number, since it is larger than the sum of its proper divisors (15277423).

2001325121 is a wasteful number, since it uses less digits than its factorization.

2001325121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15277422.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2001325121 is about 44736.1723999718. The cubic root of 2001325121 is about 1260.1992464368.

Adding to 2001325121 its reverse (1215231002), we get a palindrome (3216556123).

The spelling of 2001325121 in words is "two billion, one million, three hundred twenty-five thousand, one hundred twenty-one".