2112111321 has 24 divisors (see below), whose sum is σ = 2999578176. Its totient is φ = 1321388640.

The previous prime is 2112111319. The next prime is 2112111343. The reversal of 2112111321 is 1231112112.

It is not a de Polignac number, because 2112111321 - 2¹ = 2112111319 is a prime.

It is a super-2 number, since 2×2112111321² = 8922028464592730082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2112111321.

It is not an unprimeable number, because it can be changed into a prime (2112111301) 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 23 ways as a sum of consecutive naturals, for example, 71556 + ... + 96666.

It is an arithmetic number, because the mean of its divisors is an integer number (124982424).

Almost surely, 2^2112111321 is an apocalyptic number.

It is an amenable number.

2112111321 is a deficient number, since it is larger than the sum of its proper divisors (887466855).

2112111321 is a wasteful number, since it uses less digits than its factorization.

2112111321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25213 (or 25190 counting only the distinct ones).

The product of its digits is 24, while the sum is 15.

The square root of 2112111321 is about 45957.7123125162. The cubic root of 2112111321 is about 1283.0362736433.

Adding to 2112111321 its reverse (1231112112), we get a palindrome (3343223433).

The spelling of 2112111321 in words is "two billion, one hundred twelve million, one hundred eleven thousand, three hundred twenty-one".