2001231013331 has 4 divisors (see below), whose sum is σ = 2183161105464. Its totient is φ = 1819300921200.

The previous prime is 2001231013321. The next prime is 2001231013337. The reversal of 2001231013331 is 1333101321002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001231013331 - 2²² = 2001226819027 is a prime.

It is a super-2 number, since 2×2001231013331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001231013337) 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, 90965046050 + ... + 90965046071.

It is an arithmetic number, because the mean of its divisors is an integer number (545790276366).

Almost surely, 2^{2001231013331} is an apocalyptic number.

2001231013331 is a deficient number, since it is larger than the sum of its proper divisors (181930092133).

2001231013331 is a wasteful number, since it uses less digits than its factorization.

2001231013331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181930092132.

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

Adding to 2001231013331 its reverse (1333101321002), we get a palindrome (3334332334333).

The spelling of 2001231013331 in words is "two trillion, one billion, two hundred thirty-one million, thirteen thousand, three hundred thirty-one".