2001023231320 has 32 divisors (see below), whose sum is σ = 4657554075600. Its totient is φ = 772808971648.

The previous prime is 2001023231297. The next prime is 2001023231461. The reversal of 2001023231320 is 231323201002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 862508854 + ... + 862511173.

Almost surely, 2^{2001023231320} is an apocalyptic number.

2001023231320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001023231320 is an abundant number, since it is smaller than the sum of its proper divisors (2656530844280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001023231320 is a wasteful number, since it uses less digits than its factorization.

2001023231320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725020067 (or 1725020063 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 2001023231320 its reverse (231323201002), we get a palindrome (2232346432322).

The spelling of 2001023231320 in words is "two trillion, one billion, twenty-three million, two hundred thirty-one thousand, three hundred twenty".