11505144223201 has 4 divisors (see below), whose sum is σ = 11505936657600. Its totient is φ = 11504351788804.

The previous prime is 11505144223121. The next prime is 11505144223211. The reversal of 11505144223201 is 10232244150511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11505144223201 - 2⁷ = 11505144223073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11505144223211) by changing a digit.

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, 396195421 + ... + 396224458.

It is an arithmetic number, because the mean of its divisors is an integer number (2876484164400).

Almost surely, 2^{11505144223201} is an apocalyptic number.

It is an amenable number.

11505144223201 is a deficient number, since it is larger than the sum of its proper divisors (792434399).

11505144223201 is an equidigital number, since it uses as much as digits as its factorization.

11505144223201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792434398.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 11505144223201 its reverse (10232244150511), we get a palindrome (21737388373712).

The spelling of 11505144223201 in words is "eleven trillion, five hundred five billion, one hundred forty-four million, two hundred twenty-three thousand, two hundred one".