12215702175557 has 2 divisors, whose sum is σ = 12215702175558. Its totient is φ = 12215702175556.

The previous prime is 12215702175463. The next prime is 12215702175581. The reversal of 12215702175557 is 75557120751221.

It is a happy number.

12215702175557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11250751557796 + 964950617761 = 3354214^2 + 982319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12215702175557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12215702178557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6107851087778 + 6107851087779.

It is an arithmetic number, because the mean of its divisors is an integer number (6107851087779).

Almost surely, 2^{12215702175557} is an apocalyptic number.

It is an amenable number.

12215702175557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12215702175557 is an equidigital number, since it uses as much as digits as its factorization.

12215702175557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1715000, while the sum is 50.

The spelling of 12215702175557 in words is "twelve trillion, two hundred fifteen billion, seven hundred two million, one hundred seventy-five thousand, five hundred fifty-seven".