12205291543 has 2 divisors, whose sum is σ = 12205291544. Its totient is φ = 12205291542.

The previous prime is 12205291541. The next prime is 12205291621. The reversal of 12205291543 is 34519250221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12205291543 - 2¹ = 12205291541 is a prime.

Together with 12205291541, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12205291499 and 12205291508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12205291541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6102645771 + 6102645772.

It is an arithmetic number, because the mean of its divisors is an integer number (6102645772).

Almost surely, 2^12205291543 is an apocalyptic number.

12205291543 is a deficient number, since it is larger than the sum of its proper divisors (1).

12205291543 is an equidigital number, since it uses as much as digits as its factorization.

12205291543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 12205291543 in words is "twelve billion, two hundred five million, two hundred ninety-one thousand, five hundred forty-three".