221655006321041 has 2 divisors, whose sum is σ = 221655006321042. Its totient is φ = 221655006321040.

The previous prime is 221655006320999. The next prime is 221655006321043. The reversal of 221655006321041 is 140123600556122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195227849980816 + 26427156340225 = 13972396^2 + 5140735^2 .

It is a cyclic number.

It is not a de Polignac number, because 221655006321041 - 2²⁶ = 221654939212177 is a prime.

Together with 221655006321043, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 221655006320986 and 221655006321004.

It is not a weakly prime, because it can be changed into another prime (221655006321043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110827503160520 + 110827503160521.

It is an arithmetic number, because the mean of its divisors is an integer number (110827503160521).

Almost surely, 2^{221655006321041} is an apocalyptic number.

It is an amenable number.

221655006321041 is a deficient number, since it is larger than the sum of its proper divisors (1).

221655006321041 is an equidigital number, since it uses as much as digits as its factorization.

221655006321041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 38.

Adding to 221655006321041 its reverse (140123600556122), we get a palindrome (361778606877163).

The spelling of 221655006321041 in words is "two hundred twenty-one trillion, six hundred fifty-five billion, six million, three hundred twenty-one thousand, forty-one".