11242222661 has 2 divisors, whose sum is σ = 11242222662. Its totient is φ = 11242222660.

The previous prime is 11242222643. The next prime is 11242222697. The reversal of 11242222661 is 16622224211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11237272036 + 4950625 = 106006^2 + 2225^2 .

It is a cyclic number.

It is not a de Polignac number, because 11242222661 - 2²² = 11238028357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11242222861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5621111330 + 5621111331.

It is an arithmetic number, because the mean of its divisors is an integer number (5621111331).

Almost surely, 2^11242222661 is an apocalyptic number.

It is an amenable number.

11242222661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11242222661 is an equidigital number, since it uses as much as digits as its factorization.

11242222661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 29.

Adding to 11242222661 its reverse (16622224211), we get a palindrome (27864446872).

The spelling of 11242222661 in words is "eleven billion, two hundred forty-two million, two hundred twenty-two thousand, six hundred sixty-one".