2001013233280 has 192 divisors, whose sum is σ = 5169751516800. Its totient is φ = 739200315392.

The previous prime is 2001013233203. The next prime is 2001013233281. The reversal of 2001013233280 is 823323101002.

It is not an unprimeable number, because it can be changed into a prime (2001013233281) 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, 12298701 + ... + 12460339.

It is an arithmetic number, because the mean of its divisors is an integer number (26925789150).

Almost surely, 2^{2001013233280} is an apocalyptic number.

2001013233280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001013233280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2584875758400).

2001013233280 is an abundant number, since it is smaller than the sum of its proper divisors (3168738283520).

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

2001013233280 is a wasteful number, since it uses less digits than its factorization.

2001013233280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161739 (or 161698 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 2001013233280 its reverse (823323101002), we get a palindrome (2824336334282).

The spelling of 2001013233280 in words is "two trillion, one billion, thirteen million, two hundred thirty-three thousand, two hundred eighty".