221201020111117 has 2 divisors, whose sum is σ = 221201020111118. Its totient is φ = 221201020111116.

The previous prime is 221201020111063. The next prime is 221201020111153. The reversal of 221201020111117 is 711111020102122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204508476017316 + 16692544093801 = 14300646^2 + 4085651^2 .

It is a cyclic number.

It is not a de Polignac number, because 221201020111117 - 2¹⁵ = 221201020078349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221201020114117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600510055558 + 110600510055559.

It is an arithmetic number, because the mean of its divisors is an integer number (110600510055559).

Almost surely, 2^{221201020111117} is an apocalyptic number.

It is an amenable number.

221201020111117 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201020111117 is an equidigital number, since it uses as much as digits as its factorization.

221201020111117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 22.

Adding to 221201020111117 its reverse (711111020102122), we get a palindrome (932312040213239).

The spelling of 221201020111117 in words is "two hundred twenty-one trillion, two hundred one billion, twenty million, one hundred eleven thousand, one hundred seventeen".