11111221244345 has 4 divisors (see below), whose sum is σ = 13333465493220. Its totient is φ = 8888976995472.

The previous prime is 11111221244317. The next prime is 11111221244371. The reversal of 11111221244345 is 54344212211111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5214230673961 + 5896990570384 = 2283469^2 + 2428372^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111221244345 - 2¹⁰ = 11111221243321 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111122124430 + ... + 1111122124439.

It is an arithmetic number, because the mean of its divisors is an integer number (3333366373305).

Almost surely, 2^{11111221244345} is an apocalyptic number.

It is an amenable number.

11111221244345 is a deficient number, since it is larger than the sum of its proper divisors (2222244248875).

11111221244345 is an equidigital number, since it uses as much as digits as its factorization.

11111221244345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222244248874.

The product of its digits is 7680, while the sum is 32.

Adding to 11111221244345 its reverse (54344212211111), we get a palindrome (65455433455456).

The spelling of 11111221244345 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, two hundred forty-four thousand, three hundred forty-five".