12217073551 has 2 divisors, whose sum is σ = 12217073552. Its totient is φ = 12217073550.

The previous prime is 12217073501. The next prime is 12217073567. The reversal of 12217073551 is 15537071221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12217073551 - 2²¹ = 12214976399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12217073501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6108536775 + 6108536776.

It is an arithmetic number, because the mean of its divisors is an integer number (6108536776).

Almost surely, 2^12217073551 is an apocalyptic number.

12217073551 is a deficient number, since it is larger than the sum of its proper divisors (1).

12217073551 is an equidigital number, since it uses as much as digits as its factorization.

12217073551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14700, while the sum is 34.

The spelling of 12217073551 in words is "twelve billion, two hundred seventeen million, seventy-three thousand, five hundred fifty-one".