12543211403 has 4 divisors (see below), whose sum is σ = 12587849448. Its totient is φ = 12498573360.

The previous prime is 12543211393. The next prime is 12543211411. The reversal of 12543211403 is 30411234521.

It is a happy number.

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 12543211403 - 2¹² = 12543207307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12543211493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22318601 + ... + 22319162.

It is an arithmetic number, because the mean of its divisors is an integer number (3146962362).

Almost surely, 2^12543211403 is an apocalyptic number.

12543211403 is a deficient number, since it is larger than the sum of its proper divisors (44638045).

12543211403 is an equidigital number, since it uses as much as digits as its factorization.

12543211403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44638044.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 12543211403 its reverse (30411234521), we get a palindrome (42954445924).

The spelling of 12543211403 in words is "twelve billion, five hundred forty-three million, two hundred eleven thousand, four hundred three".