11122861 has 2 divisors, whose sum is σ = 11122862. Its totient is φ = 11122860.

The previous prime is 11122819. The next prime is 11122877. The reversal of 11122861 is 16822111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9572836 + 1550025 = 3094^2 + 1245^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122861 - 2¹³ = 11114669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11122561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561430 + 5561431.

It is an arithmetic number, because the mean of its divisors is an integer number (5561431).

Almost surely, 2^11122861 is an apocalyptic number.

11122861 is the 1492-nd centered decagonal number.

It is an amenable number.

11122861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122861 is an equidigital number, since it uses as much as digits as its factorization.

11122861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 22.

The square root of 11122861 is about 3335.0953509607. The cubic root of 11122861 is about 223.2229466116. Note that the first 3 decimals are identical.

Adding to 11122861 its reverse (16822111), we get a palindrome (27944972).

The spelling of 11122861 in words is "eleven million, one hundred twenty-two thousand, eight hundred sixty-one".