1111001100221 has 2 divisors, whose sum is σ = 1111001100222. Its totient is φ = 1111001100220.

The previous prime is 1111001100179. The next prime is 1111001100259. The reversal of 1111001100221 is 1220011001111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1109335562500 + 1665537721 = 1053250^2 + 40811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111001100221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111001100821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555500550110 + 555500550111.

It is an arithmetic number, because the mean of its divisors is an integer number (555500550111).

Almost surely, 2^{1111001100221} is an apocalyptic number.

It is an amenable number.

1111001100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111001100221 is an equidigital number, since it uses as much as digits as its factorization.

1111001100221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1111001100221 its reverse (1220011001111), we get a palindrome (2331012101332).

The spelling of 1111001100221 in words is "one trillion, one hundred eleven billion, one million, one hundred thousand, two hundred twenty-one".