12543011027 has 4 divisors (see below), whose sum is σ = 12544933416. Its totient is φ = 12541088640.

The previous prime is 12543011023. The next prime is 12543011053. The reversal of 12543011027 is 72011034521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72011034521 = 4547 ⋅15837043.

It is a cyclic number.

It is not a de Polignac number, because 12543011027 - 2² = 12543011023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12543010987 and 12543011005.

It is not an unprimeable number, because it can be changed into a prime (12543011023) 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, 951374 + ... + 964467.

It is an arithmetic number, because the mean of its divisors is an integer number (3136233354).

Almost surely, 2^12543011027 is an apocalyptic number.

12543011027 is a deficient number, since it is larger than the sum of its proper divisors (1922389).

12543011027 is an equidigital number, since it uses as much as digits as its factorization.

12543011027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922388.

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 12543011027 its reverse (72011034521), we get a palindrome (84554045548).

The spelling of 12543011027 in words is "twelve billion, five hundred forty-three million, eleven thousand, twenty-seven".