2112001321 has 4 divisors (see below), whose sum is σ = 2112097492. Its totient is φ = 2111905152.

The previous prime is 2112001319. The next prime is 2112001327. The reversal of 2112001321 is 1231002112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2060161321 + 51840000 = 45389^2 + 7200^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112001321 - 2¹ = 2112001319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112001327) 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 3 ways as a sum of consecutive naturals, for example, 2821 + ... + 65053.

It is an arithmetic number, because the mean of its divisors is an integer number (528024373).

Almost surely, 2^2112001321 is an apocalyptic number.

It is an amenable number.

2112001321 is a deficient number, since it is larger than the sum of its proper divisors (96171).

2112001321 is an equidigital number, since it uses as much as digits as its factorization.

2112001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96170.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2112001321 is about 45956.5155445885. The cubic root of 2112001321 is about 1283.0139994953.

Adding to 2112001321 its reverse (1231002112), we get a palindrome (3343003433).

It can be divided in two parts, 211200 and 1321, that added together give a square (212521 = 461²).

The spelling of 2112001321 in words is "two billion, one hundred twelve million, one thousand, three hundred twenty-one".