221102110111109 has 2 divisors, whose sum is σ = 221102110111110. Its totient is φ = 221102110111108.

The previous prime is 221102110111027. The next prime is 221102110111187. The reversal of 221102110111109 is 901111011201122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133275410983009 + 87826699128100 = 11544497^2 + 9371590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221102110111109 is a prime.

It is a super-2 number, since 2×221102110111109² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221102110111009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551055055554 + 110551055055555.

It is an arithmetic number, because the mean of its divisors is an integer number (110551055055555).

Almost surely, 2^{221102110111109} is an apocalyptic number.

It is an amenable number.

221102110111109 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102110111109 is an equidigital number, since it uses as much as digits as its factorization.

221102110111109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 23.

The spelling of 221102110111109 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred ten million, one hundred eleven thousand, one hundred nine".