2112321431 has 16 divisors (see below), whose sum is σ = 2380858368. Its totient is φ = 1856649600.

The previous prime is 2112321361. The next prime is 2112321439. The reversal of 2112321431 is 1341232112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112321431 is a prime.

It is a super-2 number, since 2×2112321431² = 8923803655723775522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112321439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503615 + ... + 507791.

It is an arithmetic number, because the mean of its divisors is an integer number (148803648).

Almost surely, 2^2112321431 is an apocalyptic number.

2112321431 is a deficient number, since it is larger than the sum of its proper divisors (268536937).

2112321431 is a wasteful number, since it uses less digits than its factorization.

2112321431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5702.

The product of its digits is 288, while the sum is 20.

The square root of 2112321431 is about 45959.9981614447. The cubic root of 2112321431 is about 1283.0788171415.

Adding to 2112321431 its reverse (1341232112), we get a palindrome (3453553543).

The spelling of 2112321431 in words is "two billion, one hundred twelve million, three hundred twenty-one thousand, four hundred thirty-one".