111221121097 has 2 divisors, whose sum is σ = 111221121098. Its totient is φ = 111221121096.

The previous prime is 111221121061. The next prime is 111221121133. The reversal of 111221121097 is 790121122111.

It is a balanced prime because it is at equal distance from previous prime (111221121061) and next prime (111221121133).

It can be written as a sum of positive squares in only one way, i.e., 84809670841 + 26411450256 = 291221^2 + 162516^2 .

It is an emirp because it is prime and its reverse (790121122111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111221121097 - 2¹¹ = 111221119049 is a prime.

It is not a weakly prime, because it can be changed into another prime (111221121017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610560548 + 55610560549.

It is an arithmetic number, because the mean of its divisors is an integer number (55610560549).

Almost surely, 2^111221121097 is an apocalyptic number.

It is an amenable number.

111221121097 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221121097 is an equidigital number, since it uses as much as digits as its factorization.

111221121097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 28.

The spelling of 111221121097 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, ninety-seven".