2001231310023 has 40 divisors (see below), whose sum is σ = 3261491925120. Its totient is φ = 1212783379920.

The previous prime is 2001231310019. The next prime is 2001231310031. The reversal of 2001231310023 is 3200131321002.

It is not a de Polignac number, because 2001231310023 - 2² = 2001231310019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001231309978 and 2001231310005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001231310063) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14263708 + ... + 14403326.

It is an arithmetic number, because the mean of its divisors is an integer number (81537298128).

Almost surely, 2^{2001231310023} is an apocalyptic number.

2001231310023 is a deficient number, since it is larger than the sum of its proper divisors (1260260615097).

2001231310023 is a wasteful number, since it uses less digits than its factorization.

2001231310023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155729 (or 155720 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 2001231310023 its reverse (3200131321002), we get a palindrome (5201362631025).

The spelling of 2001231310023 in words is "two trillion, one billion, two hundred thirty-one million, three hundred ten thousand, twenty-three".