111222101209 has 2 divisors, whose sum is σ = 111222101210. Its totient is φ = 111222101208.

The previous prime is 111222101203. The next prime is 111222101233. The reversal of 111222101209 is 902101222111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87141268809 + 24080832400 = 295197^2 + 155180^2 .

It is an emirp because it is prime and its reverse (902101222111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111222101209 - 2⁹ = 111222100697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111222101209.

It is not a weakly prime, because it can be changed into another prime (111222101203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611050604 + 55611050605.

It is an arithmetic number, because the mean of its divisors is an integer number (55611050605).

Almost surely, 2^111222101209 is an apocalyptic number.

It is an amenable number.

111222101209 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222101209 is an equidigital number, since it uses as much as digits as its factorization.

111222101209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 111222101209 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred one thousand, two hundred nine".