221102120212109 has 2 divisors, whose sum is σ = 221102120212110. Its totient is φ = 221102120212108.

The previous prime is 221102120212073. The next prime is 221102120212133. The reversal of 221102120212109 is 901212021201122.

221102120212109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145585411910884 + 75516708301225 = 12065878^2 + 8690035^2 .

It is a cyclic number.

It is not a de Polignac number, because 221102120212109 - 2⁸ = 221102120211853 is a prime.

It is a super-2 number, since 2×221102120212109² (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 (221102120212139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551060106054 + 110551060106055.

It is an arithmetic number, because the mean of its divisors is an integer number (110551060106055).

Almost surely, 2^{221102120212109} is an apocalyptic number.

It is an amenable number.

221102120212109 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102120212109 is an equidigital number, since it uses as much as digits as its factorization.

221102120212109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 221102120212109 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred twenty million, two hundred twelve thousand, one hundred nine".