2001230321031 has 24 divisors (see below), whose sum is σ = 2922220754544. Its totient is φ = 1319606346240.

The previous prime is 2001230321029. The next prime is 2001230321039. The reversal of 2001230321031 is 1301230321002.

It is not a de Polignac number, because 2001230321031 - 2¹ = 2001230321029 is a prime.

It is a super-2 number, since 2×2001230321031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001230320995 and 2001230321013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001230321039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 767721 + ... + 2142861.

It is an arithmetic number, because the mean of its divisors is an integer number (121759198106).

Almost surely, 2^{2001230321031} is an apocalyptic number.

2001230321031 is a deficient number, since it is larger than the sum of its proper divisors (920990433513).

2001230321031 is a wasteful number, since it uses less digits than its factorization.

2001230321031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376911 (or 1376908 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 2001230321031 its reverse (1301230321002), we get a palindrome (3302460642033).

It can be divided in two parts, 2001 and 230321031, that added together give a palindrome (230323032).

The spelling of 2001230321031 in words is "two trillion, one billion, two hundred thirty million, three hundred twenty-one thousand, thirty-one".