12542203243 has 4 divisors (see below), whose sum is σ = 12974693040. Its totient is φ = 12109713448.

The previous prime is 12542203241. The next prime is 12542203249. The reversal of 12542203243 is 34230224521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34230224521 = 31 ⋅1104200791.

It is a cyclic number.

It is not a de Polignac number, because 12542203243 - 2¹ = 12542203241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12542203241) 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, 216244855 + ... + 216244912.

It is an arithmetic number, because the mean of its divisors is an integer number (3243673260).

Almost surely, 2^12542203243 is an apocalyptic number.

12542203243 is a deficient number, since it is larger than the sum of its proper divisors (432489797).

12542203243 is an equidigital number, since it uses as much as digits as its factorization.

12542203243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432489796.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 12542203243 its reverse (34230224521), we get a palindrome (46772427764).

The spelling of 12542203243 in words is "twelve billion, five hundred forty-two million, two hundred three thousand, two hundred forty-three".