11223144161 has 4 divisors (see below), whose sum is σ = 11434901652. Its totient is φ = 11011386672.

The previous prime is 11223144151. The next prime is 11223144187. The reversal of 11223144161 is 16144132211.

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 5794254400 + 5428889761 = 76120^2 + 73681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11223144161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11223144161.

It is not an unprimeable number, because it can be changed into a prime (11223144151) 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, 105878666 + ... + 105878771.

It is an arithmetic number, because the mean of its divisors is an integer number (2858725413).

Almost surely, 2^11223144161 is an apocalyptic number.

It is an amenable number.

11223144161 is a deficient number, since it is larger than the sum of its proper divisors (211757491).

11223144161 is an equidigital number, since it uses as much as digits as its factorization.

11223144161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211757490.

The product of its digits is 1152, while the sum is 26.

Adding to 11223144161 its reverse (16144132211), we get a palindrome (27367276372).

The spelling of 11223144161 in words is "eleven billion, two hundred twenty-three million, one hundred forty-four thousand, one hundred sixty-one".