221166776792341 has 2 divisors, whose sum is σ = 221166776792342. Its totient is φ = 221166776792340.

The previous prime is 221166776792281. The next prime is 221166776792417. The reversal of 221166776792341 is 143297677661122.

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., 203335336584900 + 17831440207441 = 14259570^2 + 4222729^2 .

It is a cyclic number.

It is not a de Polignac number, because 221166776792341 - 2³³ = 221158186857749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221166776792041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110583388396170 + 110583388396171.

It is an arithmetic number, because the mean of its divisors is an integer number (110583388396171).

Almost surely, 2^{221166776792341} is an apocalyptic number.

It is an amenable number.

221166776792341 is a deficient number, since it is larger than the sum of its proper divisors (1).

221166776792341 is an equidigital number, since it uses as much as digits as its factorization.

221166776792341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64012032, while the sum is 64.

The spelling of 221166776792341 in words is "two hundred twenty-one trillion, one hundred sixty-six billion, seven hundred seventy-six million, seven hundred ninety-two thousand, three hundred forty-one".