2112842387 has 4 divisors (see below), whose sum is σ = 2144377416. Its totient is φ = 2081307360.

The previous prime is 2112842377. The next prime is 2112842393. The reversal of 2112842387 is 7832482112.

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

It is a cyclic number.

It is not a de Polignac number, because 2112842387 - 2⁸ = 2112842131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112842387.

It is not an unprimeable number, because it can be changed into a prime (2112842377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15767414 + ... + 15767547.

It is an arithmetic number, because the mean of its divisors is an integer number (536094354).

Almost surely, 2^2112842387 is an apocalyptic number.

2112842387 is a deficient number, since it is larger than the sum of its proper divisors (31535029).

2112842387 is an equidigital number, since it uses as much as digits as its factorization.

2112842387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31535028.

The product of its digits is 43008, while the sum is 38.

The square root of 2112842387 is about 45965.6653057475. The cubic root of 2112842387 is about 1283.1842891994.

The spelling of 2112842387 in words is "two billion, one hundred twelve million, eight hundred forty-two thousand, three hundred eighty-seven".