11440242221 has 2 divisors, whose sum is σ = 11440242222. Its totient is φ = 11440242220.

The previous prime is 11440242217. The next prime is 11440242257. The reversal of 11440242221 is 12224204411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10637653321 + 802588900 = 103139^2 + 28330^2 .

It is a cyclic number.

It is not a de Polignac number, because 11440242221 - 2² = 11440242217 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 (11440242271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5720121110 + 5720121111.

It is an arithmetic number, because the mean of its divisors is an integer number (5720121111).

Almost surely, 2^11440242221 is an apocalyptic number.

It is an amenable number.

11440242221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11440242221 is an equidigital number, since it uses as much as digits as its factorization.

11440242221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 11440242221 its reverse (12224204411), we get a palindrome (23664446632).

The spelling of 11440242221 in words is "eleven billion, four hundred forty million, two hundred forty-two thousand, two hundred twenty-one".