2001231312313 has 4 divisors (see below), whose sum is σ = 2002170418768. Its totient is φ = 2000292205860.

The previous prime is 2001231312277. The next prime is 2001231312347. The reversal of 2001231312313 is 3132131321002.

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 a de Polignac number, because none of the positive numbers 2^k-2001231312313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001231312383) 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, 469550031 + ... + 469554292.

It is an arithmetic number, because the mean of its divisors is an integer number (500542604692).

Almost surely, 2^{2001231312313} is an apocalyptic number.

It is an amenable number.

2001231312313 is a deficient number, since it is larger than the sum of its proper divisors (939106455).

2001231312313 is an equidigital number, since it uses as much as digits as its factorization.

2001231312313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939106454.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 2001231312313 its reverse (3132131321002), we get a palindrome (5133362633315).

The spelling of 2001231312313 in words is "two trillion, one billion, two hundred thirty-one million, three hundred twelve thousand, three hundred thirteen".