12551521302103 has 4 divisors (see below), whose sum is σ = 14344595773840. Its totient is φ = 10758446830368.

The previous prime is 12551521302097. The next prime is 12551521302127. The reversal of 12551521302103 is 30120312515521.

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 12551521302103 - 2¹³ = 12551521293911 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 (12551521303103) 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, 896537235858 + ... + 896537235871.

It is an arithmetic number, because the mean of its divisors is an integer number (3586148943460).

Almost surely, 2^{12551521302103} is an apocalyptic number.

12551521302103 is a deficient number, since it is larger than the sum of its proper divisors (1793074471737).

12551521302103 is an equidigital number, since it uses as much as digits as its factorization.

12551521302103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793074471736.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 12551521302103 its reverse (30120312515521), we get a palindrome (42671833817624).

The spelling of 12551521302103 in words is "twelve trillion, five hundred fifty-one billion, five hundred twenty-one million, three hundred two thousand, one hundred three".