12516621770347 has 2 divisors, whose sum is σ = 12516621770348. Its totient is φ = 12516621770346.

The previous prime is 12516621770339. The next prime is 12516621770407. The reversal of 12516621770347 is 74307712661521.

It is a happy number.

12516621770347 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12516621770347 - 2³ = 12516621770339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12516621770294 and 12516621770303.

It is not a weakly prime, because it can be changed into another prime (12516621780347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6258310885173 + 6258310885174.

It is an arithmetic number, because the mean of its divisors is an integer number (6258310885174).

Almost surely, 2^{12516621770347} is an apocalyptic number.

12516621770347 is a deficient number, since it is larger than the sum of its proper divisors (1).

12516621770347 is an equidigital number, since it uses as much as digits as its factorization.

12516621770347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 12516621770347 in words is "twelve trillion, five hundred sixteen billion, six hundred twenty-one million, seven hundred seventy thousand, three hundred forty-seven".