1227174260161 has 2 divisors, whose sum is σ = 1227174260162. Its totient is φ = 1227174260160.

The previous prime is 1227174260101. The next prime is 1227174260173. The reversal of 1227174260161 is 1610624717221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1222262913600 + 4911346561 = 1105560^2 + 70081^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227174260161 - 2¹¹ = 1227174258113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1227174260101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613587130080 + 613587130081.

It is an arithmetic number, because the mean of its divisors is an integer number (613587130081).

Almost surely, 2^{1227174260161} is an apocalyptic number.

It is an amenable number.

1227174260161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227174260161 is an equidigital number, since it uses as much as digits as its factorization.

1227174260161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

Adding to 1227174260161 its reverse (1610624717221), we get a palindrome (2837798977382).

The spelling of 1227174260161 in words is "one trillion, two hundred twenty-seven billion, one hundred seventy-four million, two hundred sixty thousand, one hundred sixty-one".