2001311013021 has 8 divisors (see below), whose sum is σ = 2682385442304. Its totient is φ = 1327221962880.

The previous prime is 2001311013019. The next prime is 2001311013067. The reversal of 2001311013021 is 1203101131002.

It is a happy number.

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

It is not a de Polignac number, because 2001311013021 - 2¹ = 2001311013019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001311013011) 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, 1746344116 + ... + 1746345261.

It is an arithmetic number, because the mean of its divisors is an integer number (335298180288).

Almost surely, 2^{2001311013021} is an apocalyptic number.

It is an amenable number.

2001311013021 is a deficient number, since it is larger than the sum of its proper divisors (681074429283).

2001311013021 is a wasteful number, since it uses less digits than its factorization.

2001311013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492689571.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 2001311013021 its reverse (1203101131002), we get a palindrome (3204412144023).

The spelling of 2001311013021 in words is "two trillion, one billion, three hundred eleven million, thirteen thousand, twenty-one".