22212109 has 2 divisors, whose sum is σ = 22212110. Its totient is φ = 22212108.

The previous prime is 22212107. The next prime is 22212131. The reversal of 22212109 is 90121222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16990884 + 5221225 = 4122^2 + 2285^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212109 - 2¹ = 22212107 is a prime.

Together with 22212107, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212101) 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, 11106054 + 11106055.

It is an arithmetic number, because the mean of its divisors is an integer number (11106055).

Almost surely, 2^22212109 is an apocalyptic number.

It is an amenable number.

22212109 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212109 is an equidigital number, since it uses as much as digits as its factorization.

22212109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 22212109 is about 4712.9724166390. The cubic root of 22212109 is about 281.1015661859.

The spelling of 22212109 in words is "twenty-two million, two hundred twelve thousand, one hundred nine".