11100050561 has 2 divisors, whose sum is σ = 11100050562. Its totient is φ = 11100050560.

The previous prime is 11100050537. The next prime is 11100050593. The reversal of 11100050561 is 16505000111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6044129536 + 5055921025 = 77744^2 + 71105^2 .

It is a cyclic number.

It is not a de Polignac number, because 11100050561 - 2⁶ = 11100050497 is a prime.

It is a super-2 number, since 2×11100050561² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11100050531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550025280 + 5550025281.

It is an arithmetic number, because the mean of its divisors is an integer number (5550025281).

Almost surely, 2^11100050561 is an apocalyptic number.

It is an amenable number.

11100050561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100050561 is an equidigital number, since it uses as much as digits as its factorization.

11100050561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 20.

Adding to 11100050561 its reverse (16505000111), we get a palindrome (27605050672).

The spelling of 11100050561 in words is "eleven billion, one hundred million, fifty thousand, five hundred sixty-one".