2001230311987 has 2 divisors, whose sum is σ = 2001230311988. Its totient is φ = 2001230311986.

The previous prime is 2001230311981. The next prime is 2001230312009. The reversal of 2001230311987 is 7891130321002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001230311987 - 2⁷ = 2001230311859 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001230311981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000615155993 + 1000615155994.

It is an arithmetic number, because the mean of its divisors is an integer number (1000615155994).

Almost surely, 2^{2001230311987} is an apocalyptic number.

2001230311987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001230311987 is an equidigital number, since it uses as much as digits as its factorization.

2001230311987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

Adding to 2001230311987 its reverse (7891130321002), we get a palindrome (9892360632989).

The spelling of 2001230311987 in words is "two trillion, one billion, two hundred thirty million, three hundred eleven thousand, nine hundred eighty-seven".