12100042543 has 8 divisors (see below), whose sum is σ = 12519226496. Its totient is φ = 11682662400.

The previous prime is 12100042531. The next prime is 12100042567. The reversal of 12100042543 is 34524000121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12100042543 - 2¹⁷ = 12099911471 is a prime.

It is a super-2 number, since 2×12100042543² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100042943) 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 7 ways as a sum of consecutive naturals, for example, 437298 + ... + 464143.

It is an arithmetic number, because the mean of its divisors is an integer number (1564903312).

Almost surely, 2^12100042543 is an apocalyptic number.

12100042543 is a deficient number, since it is larger than the sum of its proper divisors (419183953).

12100042543 is an equidigital number, since it uses as much as digits as its factorization.

12100042543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901905.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 12100042543 its reverse (34524000121), we get a palindrome (46624042664).

The spelling of 12100042543 in words is "twelve billion, one hundred million, forty-two thousand, five hundred forty-three".