2001231310031 has 2 divisors, whose sum is σ = 2001231310032. Its totient is φ = 2001231310030.

The previous prime is 2001231310019. The next prime is 2001231310063. The reversal of 2001231310031 is 1300131321002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001231310031 - 2⁶ = 2001231309967 is a prime.

It is a super-2 number, since 2×2001231310031² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001231309991 and 2001231310009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001231310081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000615655015 + 1000615655016.

It is an arithmetic number, because the mean of its divisors is an integer number (1000615655016).

Almost surely, 2^{2001231310031} is an apocalyptic number.

2001231310031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001231310031 is an equidigital number, since it uses as much as digits as its factorization.

2001231310031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 2001231310031 its reverse (1300131321002), we get a palindrome (3301362631033).

The spelling of 2001231310031 in words is "two trillion, one billion, two hundred thirty-one million, three hundred ten thousand, thirty-one".