111221121100241 has 2 divisors, whose sum is σ = 111221121100242. Its totient is φ = 111221121100240.

The previous prime is 111221121100183. The next prime is 111221121100253. The reversal of 111221121100241 is 142001121122111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75413523337216 + 35807597763025 = 8684096^2 + 5983945^2 .

It is a cyclic number.

It is not a de Polignac number, because 111221121100241 - 2¹⁸ = 111221120838097 is a prime.

It is not a weakly prime, because it can be changed into another prime (111221121100291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610560550120 + 55610560550121.

It is an arithmetic number, because the mean of its divisors is an integer number (55610560550121).

Almost surely, 2^{111221121100241} is an apocalyptic number.

It is an amenable number.

111221121100241 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221121100241 is an equidigital number, since it uses as much as digits as its factorization.

111221121100241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111221121100241 its reverse (142001121122111), we get a palindrome (253222242222352).

The spelling of 111221121100241 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred thousand, two hundred forty-one".