2112131243 has 2 divisors, whose sum is σ = 2112131244. Its totient is φ = 2112131242.

The previous prime is 2112131207. The next prime is 2112131299. The reversal of 2112131243 is 3421312112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2112131243 - 2²⁰ = 2111082667 is a prime.

It is a super-2 number, since 2×2112131243² = 8922196775313450098, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2112131843) 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 as a sum of consecutive naturals, namely, 1056065621 + 1056065622.

It is an arithmetic number, because the mean of its divisors is an integer number (1056065622).

Almost surely, 2^2112131243 is an apocalyptic number.

2112131243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112131243 is an equidigital number, since it uses as much as digits as its factorization.

2112131243 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2112131243 is about 45957.9290547344. The cubic root of 2112131243 is about 1283.0403076112.

Adding to 2112131243 its reverse (3421312112), we get a palindrome (5533443355).

The spelling of 2112131243 in words is "two billion, one hundred twelve million, one hundred thirty-one thousand, two hundred forty-three".