2001230312001 has 4 divisors (see below), whose sum is σ = 2668307082672. Its totient is φ = 1334153541332.

The previous prime is 2001230311987. The next prime is 2001230312009. The reversal of 2001230312001 is 1002130321002.

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 2001230312001 - 2¹⁸ = 2001230049857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001230312009) 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, 333538385331 + ... + 333538385336.

It is an arithmetic number, because the mean of its divisors is an integer number (667076770668).

Almost surely, 2^{2001230312001} is an apocalyptic number.

It is an amenable number.

2001230312001 is a deficient number, since it is larger than the sum of its proper divisors (667076770671).

2001230312001 is an equidigital number, since it uses as much as digits as its factorization.

2001230312001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667076770670.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 2001230312001 its reverse (1002130321002), we get a palindrome (3003360633003).

Subtracting from 2001230312001 its reverse (1002130321002), we obtain a palindrome (999099990999).

The spelling of 2001230312001 in words is "two trillion, one billion, two hundred thirty million, three hundred twelve thousand, one".