11421224161 has 2 divisors, whose sum is σ = 11421224162. Its totient is φ = 11421224160.

The previous prime is 11421224153. The next prime is 11421224203. The reversal of 11421224161 is 16142212411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8734771600 + 2686452561 = 93460^2 + 51831^2 .

It is a cyclic number.

It is not a de Polignac number, because 11421224161 - 2³ = 11421224153 is a prime.

It is a super-2 number, since 2×11421224161² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11421224561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710612080 + 5710612081.

It is an arithmetic number, because the mean of its divisors is an integer number (5710612081).

Almost surely, 2^11421224161 is an apocalyptic number.

It is an amenable number.

11421224161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11421224161 is an equidigital number, since it uses as much as digits as its factorization.

11421224161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 25.

Adding to 11421224161 its reverse (16142212411), we get a palindrome (27563436572).

The spelling of 11421224161 in words is "eleven billion, four hundred twenty-one million, two hundred twenty-four thousand, one hundred sixty-one".