2001326120 has 32 divisors (see below), whose sum is σ = 4507914600. Its totient is φ = 799653888.

The previous prime is 2001326111. The next prime is 2001326123. The reversal of 2001326120 is 216231002.

It can be written as a sum of positive squares in 4 ways, for example, as 739513636 + 1261812484 = 27194^2 + 35522^2 .

It is not an unprimeable number, because it can be changed into a prime (2001326123) 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, 10232 + ... + 64088.

Almost surely, 2^2001326120 is an apocalyptic number.

2001326120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001326120 is an abundant number, since it is smaller than the sum of its proper divisors (2506588480).

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

2001326120 is a wasteful number, since it uses less digits than its factorization.

2001326120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54797 (or 54793 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2001326120 is about 44736.1835654317. The cubic root of 2001326120 is about 1260.1994561210.

Adding to 2001326120 its reverse (216231002), we get a palindrome (2217557122).

The spelling of 2001326120 in words is "two billion, one million, three hundred twenty-six thousand, one hundred twenty".