11142044821 has 2 divisors, whose sum is σ = 11142044822. Its totient is φ = 11142044820.

The previous prime is 11142044779. The next prime is 11142044827. The reversal of 11142044821 is 12844024111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10965021796 + 177023025 = 104714^2 + 13305^2 .

It is a cyclic number.

It is not a de Polignac number, because 11142044821 - 2²³ = 11133656213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11142044821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11142044827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5571022410 + 5571022411.

It is an arithmetic number, because the mean of its divisors is an integer number (5571022411).

Almost surely, 2^11142044821 is an apocalyptic number.

It is an amenable number.

11142044821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11142044821 is an equidigital number, since it uses as much as digits as its factorization.

11142044821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 28.

Adding to 11142044821 its reverse (12844024111), we get a palindrome (23986068932).

The spelling of 11142044821 in words is "eleven billion, one hundred forty-two million, forty-four thousand, eight hundred twenty-one".