2112423231 has 4 divisors (see below), whose sum is σ = 2816564312. Its totient is φ = 1408282152.

The previous prime is 2112423227. The next prime is 2112423251. The reversal of 2112423231 is 1323242112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2112423231 - 2² = 2112423227 is a prime.

It is a super-2 number, since 2×2112423231² = 8924663813736958722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112423198 and 2112423207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112423221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352070536 + ... + 352070541.

It is an arithmetic number, because the mean of its divisors is an integer number (704141078).

Almost surely, 2^2112423231 is an apocalyptic number.

2112423231 is a deficient number, since it is larger than the sum of its proper divisors (704141081).

2112423231 is an equidigital number, since it uses as much as digits as its factorization.

2112423231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704141080.

The product of its digits is 576, while the sum is 21.

The square root of 2112423231 is about 45961.1056329153. The cubic root of 2112423231 is about 1283.0994287971.

Adding to 2112423231 its reverse (1323242112), we get a palindrome (3435665343).

The spelling of 2112423231 in words is "two billion, one hundred twelve million, four hundred twenty-three thousand, two hundred thirty-one".