11217243641 has 4 divisors (see below), whose sum is σ = 11222054052. Its totient is φ = 11212433232.

The previous prime is 11217243629. The next prime is 11217243677. The reversal of 11217243641 is 14634271211.

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 2008922041 + 9208321600 = 44821^2 + 95960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11217243641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11217243598 and 11217243607.

It is not an unprimeable number, because it can be changed into a prime (11217243601) 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, 2401706 + ... + 2406371.

It is an arithmetic number, because the mean of its divisors is an integer number (2805513513).

Almost surely, 2^11217243641 is an apocalyptic number.

It is an amenable number.

11217243641 is a deficient number, since it is larger than the sum of its proper divisors (4810411).

11217243641 is an equidigital number, since it uses as much as digits as its factorization.

11217243641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4810410.

The product of its digits is 8064, while the sum is 32.

The spelling of 11217243641 in words is "eleven billion, two hundred seventeen million, two hundred forty-three thousand, six hundred forty-one".