11212609 has 2 divisors, whose sum is σ = 11212610. Its totient is φ = 11212608.

The previous prime is 11212601. The next prime is 11212631. The reversal of 11212609 is 90621211.

It is an a-pointer prime, because the next prime (11212631) can be obtained adding 11212609 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7398400 + 3814209 = 2720^2 + 1953^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212609 - 2³ = 11212601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11212609.

It is not a weakly prime, because it can be changed into another prime (11212601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606304 + 5606305.

It is an arithmetic number, because the mean of its divisors is an integer number (5606305).

Almost surely, 2^11212609 is an apocalyptic number.

It is an amenable number.

11212609 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212609 is an equidigital number, since it uses as much as digits as its factorization.

11212609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 11212609 is about 3348.5234059209. The cubic root of 11212609 is about 223.8217185283.

It can be divided in two parts, 112 and 12609, that added together give a palindrome (12721).

The spelling of 11212609 in words is "eleven million, two hundred twelve thousand, six hundred nine".