2001111321 has 16 divisors (see below), whose sum is σ = 2911462848. Its totient is φ = 1212480000.

The previous prime is 2001111289. The next prime is 2001111337. The reversal of 2001111321 is 1231111002.

It is not a de Polignac number, because 2001111321 - 2⁵ = 2001111289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001111297 and 2001111306.

It is not an unprimeable number, because it can be changed into a prime (2001111341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217821 + ... + 226821.

It is an arithmetic number, because the mean of its divisors is an integer number (181966428).

Almost surely, 2^2001111321 is an apocalyptic number.

It is an amenable number.

2001111321 is a deficient number, since it is larger than the sum of its proper divisors (910351527).

2001111321 is a wasteful number, since it uses less digits than its factorization.

2001111321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15752.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 2001111321 is about 44733.7827709663. The cubic root of 2001111321 is about 1260.1543694716.

Adding to 2001111321 its reverse (1231111002), we get a palindrome (3232222323).

The spelling of 2001111321 in words is "two billion, one million, one hundred eleven thousand, three hundred twenty-one".