1224205211 has 4 divisors (see below), whose sum is σ = 1226270232. Its totient is φ = 1222140192.

The previous prime is 1224205181. The next prime is 1224205223. The reversal of 1224205211 is 1125024221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1224205211 - 2¹⁴ = 1224188827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224205111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1031621 + ... + 1032806.

It is an arithmetic number, because the mean of its divisors is an integer number (306567558).

Almost surely, 2^1224205211 is an apocalyptic number.

1224205211 is a deficient number, since it is larger than the sum of its proper divisors (2065021).

1224205211 is an equidigital number, since it uses as much as digits as its factorization.

1224205211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065020.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1224205211 is about 34988.6440291704. The cubic root of 1224205211 is about 1069.7560252551.

Adding to 1224205211 its reverse (1125024221), we get a palindrome (2349229432).

The spelling of 1224205211 in words is "one billion, two hundred twenty-four million, two hundred five thousand, two hundred eleven".