12117647797501 has 2 divisors, whose sum is σ = 12117647797502. Its totient is φ = 12117647797500.

The previous prime is 12117647797487. The next prime is 12117647797543. The reversal of 12117647797501 is 10579774671121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6265264308601 + 5852383488900 = 2503051^2 + 2419170^2 .

It is a cyclic number.

It is not a de Polignac number, because 12117647797501 - 2¹⁷ = 12117647666429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12117647797561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6058823898750 + 6058823898751.

It is an arithmetic number, because the mean of its divisors is an integer number (6058823898751).

Almost surely, 2^{12117647797501} is an apocalyptic number.

It is an amenable number.

12117647797501 is a deficient number, since it is larger than the sum of its proper divisors (1).

12117647797501 is an equidigital number, since it uses as much as digits as its factorization.

12117647797501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5186160, while the sum is 58.

The spelling of 12117647797501 in words is "twelve trillion, one hundred seventeen billion, six hundred forty-seven million, seven hundred ninety-seven thousand, five hundred one".