111201210210109 has 2 divisors, whose sum is σ = 111201210210110. Its totient is φ = 111201210210108.

The previous prime is 111201210210091. The next prime is 111201210210221. The reversal of 111201210210109 is 901012012102111.

It is a happy number.

Together with previous prime (111201210210091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109056186342009 + 2145023868100 = 10442997^2 + 1464590^2 .

It is a cyclic number.

It is not a de Polignac number, because 111201210210109 - 2⁷ = 111201210209981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111201210210109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111201910210109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600605105054 + 55600605105055.

It is an arithmetic number, because the mean of its divisors is an integer number (55600605105055).

Almost surely, 2^{111201210210109} is an apocalyptic number.

It is an amenable number.

111201210210109 is a deficient number, since it is larger than the sum of its proper divisors (1).

111201210210109 is an equidigital number, since it uses as much as digits as its factorization.

111201210210109 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 22.

The spelling of 111201210210109 in words is "one hundred eleven trillion, two hundred one billion, two hundred ten million, two hundred ten thousand, one hundred nine".