2001311033321 has 4 divisors (see below), whose sum is σ = 2020741237632. Its totient is φ = 1981880829012.

The previous prime is 2001311033303. The next prime is 2001311033339. The reversal of 2001311033321 is 1233301131002.

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 an interprime number because it is at equal distance from previous prime (2001311033303) and next prime (2001311033339).

It is a cyclic number.

It is not a de Polignac number, because 2001311033321 - 2¹⁸ = 2001310771177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001311033293 and 2001311033302.

It is not an unprimeable number, because it can be changed into a prime (2001311033341) 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, 9715102001 + ... + 9715102206.

It is an arithmetic number, because the mean of its divisors is an integer number (505185309408).

Almost surely, 2^{2001311033321} is an apocalyptic number.

It is an amenable number.

2001311033321 is a deficient number, since it is larger than the sum of its proper divisors (19430204311).

2001311033321 is a wasteful number, since it uses less digits than its factorization.

2001311033321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19430204310.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 2001311033321 its reverse (1233301131002), we get a palindrome (3234612164323).

The spelling of 2001311033321 in words is "two trillion, one billion, three hundred eleven million, thirty-three thousand, three hundred twenty-one".