12542320111 has 4 divisors (see below), whose sum is σ = 12549380032. Its totient is φ = 12535260192.

The previous prime is 12542320103. The next prime is 12542320159. The reversal of 12542320111 is 11102324521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12542320111 - 2³ = 12542320103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12542320181) 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, 3527295 + ... + 3530848.

It is an arithmetic number, because the mean of its divisors is an integer number (3137345008).

Almost surely, 2^12542320111 is an apocalyptic number.

12542320111 is a deficient number, since it is larger than the sum of its proper divisors (7059921).

12542320111 is an equidigital number, since it uses as much as digits as its factorization.

12542320111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7059920.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 12542320111 its reverse (11102324521), we get a palindrome (23644644632).

The spelling of 12542320111 in words is "twelve billion, five hundred forty-two million, three hundred twenty thousand, one hundred eleven".