12165642342211 has 2 divisors, whose sum is σ = 12165642342212. Its totient is φ = 12165642342210.

The previous prime is 12165642342187. The next prime is 12165642342221. The reversal of 12165642342211 is 11224324656121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12165642342211 - 2³¹ = 12163494858563 is a prime.

It is not a weakly prime, because it can be changed into another prime (12165642342221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6082821171105 + 6082821171106.

It is an arithmetic number, because the mean of its divisors is an integer number (6082821171106).

Almost surely, 2^{12165642342211} is an apocalyptic number.

12165642342211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12165642342211 is an equidigital number, since it uses as much as digits as its factorization.

12165642342211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 40.

Adding to 12165642342211 its reverse (11224324656121), we get a palindrome (23389966998332).

The spelling of 12165642342211 in words is "twelve trillion, one hundred sixty-five billion, six hundred forty-two million, three hundred forty-two thousand, two hundred eleven".