221102222220001 has 2 divisors, whose sum is σ = 221102222220002. Its totient is φ = 221102222220000.

The previous prime is 221102222219999. The next prime is 221102222220007. The reversal of 221102222220001 is 100022222201122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137337187619025 + 83765034600976 = 11719095^2 + 9152324^2 .

It is a cyclic number.

It is not a de Polignac number, because 221102222220001 - 2¹ = 221102222219999 is a prime.

It is a super-5 number, since 5×221102222220001⁵ (a number of 73 digits) contains 55555 as substring.

Together with 221102222219999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221102222220007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551111110000 + 110551111110001.

It is an arithmetic number, because the mean of its divisors is an integer number (110551111110001).

Almost surely, 2^{221102222220001} is an apocalyptic number.

It is an amenable number.

221102222220001 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102222220001 is an equidigital number, since it uses as much as digits as its factorization.

221102222220001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221102222220001 its reverse (100022222201122), we get a palindrome (321124444421123).

The spelling of 221102222220001 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred twenty-two million, two hundred twenty thousand, one".