13251043123 has 4 divisors (see below), whose sum is σ = 13324253488. Its totient is φ = 13177832760.

The previous prime is 13251043111. The next prime is 13251043151. The reversal of 13251043123 is 32134015231.

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 13251043123 - 2³³ = 4661108531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13251043163) 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, 36604911 + ... + 36605272.

It is an arithmetic number, because the mean of its divisors is an integer number (3331063372).

Almost surely, 2^13251043123 is an apocalyptic number.

13251043123 is a deficient number, since it is larger than the sum of its proper divisors (73210365).

13251043123 is an equidigital number, since it uses as much as digits as its factorization.

13251043123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73210364.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 13251043123 its reverse (32134015231), we get a palindrome (45385058354).

The spelling of 13251043123 in words is "thirteen billion, two hundred fifty-one million, forty-three thousand, one hundred twenty-three".