12507821909087 has 2 divisors, whose sum is σ = 12507821909088. Its totient is φ = 12507821909086.

The previous prime is 12507821908951. The next prime is 12507821909159. The reversal of 12507821909087 is 78090912870521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12507821909087 - 2²⁰ = 12507820860511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12507821909887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6253910954543 + 6253910954544.

It is an arithmetic number, because the mean of its divisors is an integer number (6253910954544).

Almost surely, 2^{12507821909087} is an apocalyptic number.

12507821909087 is a deficient number, since it is larger than the sum of its proper divisors (1).

12507821909087 is an equidigital number, since it uses as much as digits as its factorization.

12507821909087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 59.

The spelling of 12507821909087 in words is "twelve trillion, five hundred seven billion, eight hundred twenty-one million, nine hundred nine thousand, eighty-seven".