2001323120 has 40 divisors (see below), whose sum is σ = 4655795760. Its totient is φ = 800061440.

The previous prime is 2001323087. The next prime is 2001323123. The reversal of 2001323120 is 213231002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 2001323095 and 2001323104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001323123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152000 + ... + 164640.

It is an arithmetic number, because the mean of its divisors is an integer number (116394894).

Almost surely, 2^2001323120 is an apocalyptic number.

2001323120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001323120 is an abundant number, since it is smaller than the sum of its proper divisors (2654472640).

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

2001323120 is a wasteful number, since it uses less digits than its factorization.

2001323120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14633 (or 14627 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2001323120 is about 44736.1500355138. The cubic root of 2001323120 is about 1260.1988264385.

Adding to 2001323120 its reverse (213231002), we get a palindrome (2214554122).

The spelling of 2001323120 in words is "two billion, one million, three hundred twenty-three thousand, one hundred twenty".