2001321111031 has 8 divisors (see below), whose sum is σ = 2183288576400. Its totient is φ = 1819358509440.

The previous prime is 2001321110993. The next prime is 2001321111079. The reversal of 2001321111031 is 1301111231002.

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 not a de Polignac number, because 2001321111031 - 2²¹ = 2001319013879 is a prime.

It is a super-2 number, since 2×2001321111031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001321110996 and 2001321111014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001321111431) 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 in 7 ways as a sum of consecutive naturals, for example, 327346 + ... + 2027263.

It is an arithmetic number, because the mean of its divisors is an integer number (272911072050).

Almost surely, 2^{2001321111031} is an apocalyptic number.

2001321111031 is a deficient number, since it is larger than the sum of its proper divisors (181967465369).

2001321111031 is a wasteful number, since it uses less digits than its factorization.

2001321111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431889.

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

Adding to 2001321111031 its reverse (1301111231002), we get a palindrome (3302432342033).

It can be divided in two parts, 200 and 1321111031, that added together give a palindrome (1321111231).

The spelling of 2001321111031 in words is "two trillion, one billion, three hundred twenty-one million, one hundred eleven thousand, thirty-one".