2001330121 has 4 divisors (see below), whose sum is σ = 2287234432. Its totient is φ = 1715425812.

The previous prime is 2001330101. The next prime is 2001330131. The reversal of 2001330121 is 1210331002.

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 2001330121 - 2²⁹ = 1464459209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001330101) 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, 142952145 + ... + 142952158.

It is an arithmetic number, because the mean of its divisors is an integer number (571808608).

Almost surely, 2^2001330121 is an apocalyptic number.

It is an amenable number.

2001330121 is a deficient number, since it is larger than the sum of its proper divisors (285904311).

2001330121 is an equidigital number, since it uses as much as digits as its factorization.

2001330121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285904310.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2001330121 is about 44736.2282831264. The cubic root of 2001330121 is about 1260.2002959067.

Adding to 2001330121 its reverse (1210331002), we get a palindrome (3211661123).

The spelling of 2001330121 in words is "two billion, one million, three hundred thirty thousand, one hundred twenty-one".