2001021311311 has 8 divisors (see below), whose sum is σ = 2186715591504. Its totient is φ = 1815957573120.

The previous prime is 2001021311297. The next prime is 2001021311381. The reversal of 2001021311311 is 1131131201002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001021311311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001021311381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157628860 + ... + 157641553.

It is an arithmetic number, because the mean of its divisors is an integer number (273339448938).

Almost surely, 2^{2001021311311} is an apocalyptic number.

2001021311311 is a deficient number, since it is larger than the sum of its proper divisors (185694280193).

2001021311311 is a wasteful number, since it uses less digits than its factorization.

2001021311311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315271001.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 2001021311311 its reverse (1131131201002), we get a palindrome (3132152512313).

The spelling of 2001021311311 in words is "two trillion, one billion, twenty-one million, three hundred eleven thousand, three hundred eleven".