12551521302127 has 2 divisors, whose sum is σ = 12551521302128. Its totient is φ = 12551521302126.

The previous prime is 12551521302097. The next prime is 12551521302217. The reversal of 12551521302127 is 72120312515521.

Together with next prime (12551521302217) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (72120312515521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12551521302127 - 2¹¹ = 12551521300079 is a prime.

It is a super-2 number, since 2×12551521302127² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12551521302227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275760651063 + 6275760651064.

It is an arithmetic number, because the mean of its divisors is an integer number (6275760651064).

Almost surely, 2^{12551521302127} is an apocalyptic number.

12551521302127 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551521302127 is an equidigital number, since it uses as much as digits as its factorization.

12551521302127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42000, while the sum is 37.

Adding to 12551521302127 its reverse (72120312515521), we get a palindrome (84671833817648).

The spelling of 12551521302127 in words is "twelve trillion, five hundred fifty-one billion, five hundred twenty-one million, three hundred two thousand, one hundred twenty-seven".