212221722677101 has 2 divisors, whose sum is σ = 212221722677102. Its totient is φ = 212221722677100.

The previous prime is 212221722677017. The next prime is 212221722677177. The reversal of 212221722677101 is 101776227122212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166981960622500 + 45239762054601 = 12922150^2 + 6726051^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221722677101 - 2⁹ = 212221722676589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221723677101) 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, 106110861338550 + 106110861338551.

It is an arithmetic number, because the mean of its divisors is an integer number (106110861338551).

Almost surely, 2^{212221722677101} is an apocalyptic number.

It is an amenable number.

212221722677101 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221722677101 is an equidigital number, since it uses as much as digits as its factorization.

212221722677101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131712, while the sum is 43.

Adding to 212221722677101 its reverse (101776227122212), we get a palindrome (313997949799313).

The spelling of 212221722677101 in words is "two hundred twelve trillion, two hundred twenty-one billion, seven hundred twenty-two million, six hundred seventy-seven thousand, one hundred one".