11241235561 has 2 divisors, whose sum is σ = 11241235562. Its totient is φ = 11241235560.

The previous prime is 11241235529. The next prime is 11241235573. The reversal of 11241235561 is 16553214211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10308543961 + 932691600 = 101531^2 + 30540^2 .

It is a cyclic number.

It is not a de Polignac number, because 11241235561 - 2⁵ = 11241235529 is a prime.

It is not a weakly prime, because it can be changed into another prime (11241235361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5620617780 + 5620617781.

It is an arithmetic number, because the mean of its divisors is an integer number (5620617781).

Almost surely, 2^11241235561 is an apocalyptic number.

It is an amenable number.

11241235561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11241235561 is an equidigital number, since it uses as much as digits as its factorization.

11241235561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 31.

Adding to 11241235561 its reverse (16553214211), we get a palindrome (27794449772).

The spelling of 11241235561 in words is "eleven billion, two hundred forty-one million, two hundred thirty-five thousand, five hundred sixty-one".