2001130321 has 16 divisors (see below), whose sum is σ = 2091363840. Its totient is φ = 1912659840.

The previous prime is 2001130309. The next prime is 2001130357. The reversal of 2001130321 is 1230311002.

It is a cyclic number.

It is not a de Polignac number, because 2001130321 - 2¹¹ = 2001128273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001130301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 870045 + ... + 872341.

It is an arithmetic number, because the mean of its divisors is an integer number (130710240).

Almost surely, 2^2001130321 is an apocalyptic number.

It is an amenable number.

2001130321 is a deficient number, since it is larger than the sum of its proper divisors (90233519).

2001130321 is a wasteful number, since it uses less digits than its factorization.

2001130321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2001130321 is about 44733.9951379261. The cubic root of 2001130321 is about 1260.1583577317.

Adding to 2001130321 its reverse (1230311002), we get a palindrome (3231441323).

The spelling of 2001130321 in words is "two billion, one million, one hundred thirty thousand, three hundred twenty-one".