2112312321 has 12 divisors (see below), whose sum is σ = 3486991872. Its totient is φ = 1207035576.

The previous prime is 2112312281. The next prime is 2112312421. The reversal of 2112312321 is 1232132112.

2112312321 is a `hidden beast` number, since 21 + 12 + 312 + 321 = 666.

It is not a de Polignac number, because 2112312321 - 2⁹ = 2112311809 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2112312294 and 2112312303.

It is not an unprimeable number, because it can be changed into a prime (2112312421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16764321 + ... + 16764446.

It is an arithmetic number, because the mean of its divisors is an integer number (290582656).

Almost surely, 2^2112312321 is an apocalyptic number.

2112312321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2112312321 is a deficient number, since it is larger than the sum of its proper divisors (1374679551).

2112312321 is a wasteful number, since it uses less digits than its factorization.

2112312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33528780 (or 33528777 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2112312321 is about 45959.8990534139. The cubic root of 2112312321 is about 1283.0769725888.

Adding to 2112312321 its reverse (1232132112), we get a palindrome (3344444433).

The spelling of 2112312321 in words is "two billion, one hundred twelve million, three hundred twelve thousand, three hundred twenty-one".