2001231023303 has 16 divisors (see below), whose sum is σ = 2120945400000. Its totient is φ = 1881738957312.

The previous prime is 2001231023279. The next prime is 2001231023369. The reversal of 2001231023303 is 3033201321002.

It is a cyclic number.

It is not a de Polignac number, because 2001231023303 - 2¹⁴ = 2001231006919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001231023003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165262013 + ... + 165274121.

It is an arithmetic number, because the mean of its divisors is an integer number (132559087500).

Almost surely, 2^{2001231023303} is an apocalyptic number.

2001231023303 is a deficient number, since it is larger than the sum of its proper divisors (119714376697).

2001231023303 is a wasteful number, since it uses less digits than its factorization.

2001231023303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20474.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 2001231023303 its reverse (3033201321002), we get a palindrome (5034432344305).

The spelling of 2001231023303 in words is "two trillion, one billion, two hundred thirty-one million, twenty-three thousand, three hundred three".