1223130211 has 4 divisors (see below), whose sum is σ = 1230454512. Its totient is φ = 1215805912.

The previous prime is 1223130199. The next prime is 1223130221. The reversal of 1223130211 is 1120313221.

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 1223130211 - 2¹⁷ = 1222999139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223130221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3661900 + ... + 3662233.

It is an arithmetic number, because the mean of its divisors is an integer number (307613628).

Almost surely, 2^1223130211 is an apocalyptic number.

1223130211 is a deficient number, since it is larger than the sum of its proper divisors (7324301).

1223130211 is an equidigital number, since it uses as much as digits as its factorization.

1223130211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7324300.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1223130211 is about 34973.2785280419. The cubic root of 1223130211 is about 1069.4428085682.

Adding to 1223130211 its reverse (1120313221), we get a palindrome (2343443432).

The spelling of 1223130211 in words is "one billion, two hundred twenty-three million, one hundred thirty thousand, two hundred eleven".